Carcinoma de células escamosas (cce) em cão na região prepucial: relato de caso / Squamous cell carcinoma (scc) in dog in the preputial region: case report / Carcinoma de células escamosas (cce) en perro de la región prepucial: reporte de un caso

A expectativa de vida dos animais de companhia vem aumentando devido as mudanças comportamentais e de cuidados dos tutores. Em analogia, com as idades cada vez mais avançadas, é comum o desenvolvimento de doenças associadas, sendo o tumor o mais comum entre elas. Todavia, as neoplasias mais comuns na clínica de pequenos animais estão associadas ao sistema tegumentar. O carcinoma de células escamosas (CCE), ou carcinoma espinocelular, é uma neoplasia de epitélio, maligno, de crescimento lento e de baixo potencial metastático. Sua etiologia ainda não é precisamente conhecida e a causa exógena mais comum e descrita pela literatura é a exposição à luz ultravioleta, gerando consequentes lesões nas estruturas genéticas e imunogênicas na pele. Além disso, essas lesões apresentam-se de forma mais comum em animais de pelagem clara, com grande exposição solar e em área anatômicas hipopigmentadas. O prognóstico varia de acordo com a localização e o estágio clínico, sendo favorável o diagnóstico realizado precocemente, e o tratamento consiste na avaliação clínica seguida do protocolo adequado O presente relato de caso tem como objetivo principal reunir e discutir informações associadas sobre o carcinoma de células escamosas em caninos e felinos, abordando aspectos clínicos e patológicos, a fim de facilitar o raciocínio sobre o CCE, desde sua abordagem inicial, até seu diagnóstico final e estadiamento.(AU)

The life expectancy of companion animals has been increasing due to behavioral and care changes of the guardians. In analogy, with the increasingly advanced ages, the development of associated diseases is common, the tumor being the most common among them. However, the most common neoplasms in the small animal clinic are associated with the integumentary system. Squamous cell carcinoma (SCC), or squamous cell carcinoma, is a malignant, slow-growing, low-potential metastatic epithelial neoplasm. Its etiology is not yet precisely known and the most common exogenous cause described by the literature is exposure to ultraviolet light, generating consequent lesions on the genetic and immunogenic structures in the skin. In addition, these lesions are more common in light-haired animals, with high exposure to the sun, and in hypopigmented anatomical areas. The prognosis varies according to the location and clinical stage, being favorable to the early diagnosis, and the treatment consists in the clinical evaluation followed by the appropriate protocol. The present case report has as its main objective to gather and discuss associated information about squamous cell carcinoma in canines and cats, addressing clinical and pathological aspects, in order to facilitate the reasoning about the CCE, from its initial approach, to its final diagnosis and staging.(AU)

La esperanza de vida de los animales de compañía ha ido en aumento debido a los cambios de comportamiento y cuidado de los guardianes. Por analogía, con las edades cada vez más avanzadas, el desarrollo de enfermedades asociadas es común, siendo el tumor el más común entre ellos. Sin embargo, las neoplasias más comunes en la clínica de animales pequeños se asocian con el sistema tegumentario. El carcinoma epidermoide (CCE), o carcinoma epidermoide, es una neoplasia epitelial metastásica maligna de crecimiento lento y bajo potencial. Su etiología aún no se conoce con precisión y la causa exógena más común descrita por la literatura es la exposición a la luz ultravioleta, generando lesiones consecuentes en las estructuras genéticas e inmunogénicas de la piel. Además, estas lesiones son más comunes en animales de pelo claro, con alta exposición al sol, y en áreas anatómicas hipopigmentadas. El pronóstico varía según la localización y el estadio clínico, siendo favorable al diagnóstico precoz, y el tratamiento consiste en la evaluación clínica seguida del protocolo adecuado. El presente reporte de caso tiene como objetivo principal reunir y discutir información asociada sobre el carcinoma epidermoide en caninos y gatos, abordando aspectos clínicos y patológicos, con el fin de facilitar el razonamiento sobre el CCE, desde su abordaje inicial, hasta su diagnóstico final y estadificación.(AU)

Identification of Pentatrichomonas hominis in preputial washes of bulls in Brazil / Identificação de Pentatrichomonas hominis em lavado prepucial de touros no Brasil

The parabasalid Pentatrichomonas hominis is generally considered to represent a symbiotic component of the gastrointestinal microbiota in a wide variety of vertebrate hosts including humans. Nevertheless, a limited number of studies have raised the possibility that it may act as a pathogen of humans, dogs, and pigs and that some human infections may have a zoonotic origin. Data from North America revealed an association between P. hominis and the bovine urogenital tract, principally in bulls and rarely in cows. The importance of this observation is linked to possible interference in the accurate diagnosis of the economically important venereal pathogen Tritrichomonas foetus. The current study employed culture-based and molecular methods to examine the preputial cavities of four breeding bulls, raised in open pasture in southeastern Brazil, for the presence of trichomonads. Motile protozoa were isolated from three of the bulls and were definitively identified as P. hominis based on nucleotide sequencing of polymerase chain reaction (PCR) amplicons derived from the ribosomal RNA operon (ITS1-5.8S rDNA-ITS2) of the parasite. The potential implications of these findings for bovine and human health are discussed.(AU)

O parabasalídeo Pentatrichomonas hominis é geralmente considerado um componente simbiótico da microbiota gastrointestinal em uma ampla variedade de hospedeiros vertebrados, incluindo os humanos. No entanto, um número limitado de estudos levantou a possibilidade de que possa atuar como patógeno de humanos, cães e suínos, e que algumas infecções humanas possam ter origem zoonótica. Dados da América do Norte revelaram uma associação entre P. hominis e o trato urogenital bovino, principalmente, em touros e raramente em vacas. A importância dessa observação está ligada a uma possível interferência no diagnóstico preciso do patógeno venéreo de importância econômica Tritrichomonas foetus. O presente estudo empregou métodos baseados em cultura em combinação com técnicas moleculares, para examinar as cavidades prepuciais de quatro touros, criados em pastagem aberta no sudeste do Brasil, quanto à presença de tricomonas. Protozoários móveis foram isolados de três dos touros e foram definitivamente identificados como P. hominis com base no sequenciamento de nucleotídeos de amplicons geradas pela reação em cadeia da polimerase (PCR), empregando a região RNA ribossômico (ITS1-5.8S rDNA-ITS2) do parasita como alvo. Os potenciais implicações desses achados para a saúde bovina e humana são discutidas.(AU)

Reconstrução prepucial com uso de enxerto combinado em cães / Preputial reconstruction combined with graft in dogs

Background: Preputial injuries are significant in the clinical routine. Traumas, conditions, and mass excision result in extensive and full-thickness defects that lead to chronic penile exposure and consequential injuries. Severe injuries may require preputial reconstructive surgery to restore function and aesthetics. The objective is to report the use of the preputial reconstruction technique using the caudal superficial epigastric axial standard flap associated with a single-stage, full-thickness oral mucosa graft in 3 dogs where the loss of the prepuce was significant. Cases: Three dogs were admitted to the Veterinary Teaching Hospital of UFMT with preputial lesions of different etiologies. All cases were referred for preventive reconstruction using a flap in the caudal axial epigastric pattern associated with a single-stage oral mucosa graft. In the 3 reported cases, changes that compromised surgical success, such as suture dehiscence, necrosis, or infection, were not observed during hospitalization. Cutaneous stitch dehiscence, however, was observed in all 3 cases. Dog 1. A small point of dehiscence and tissue necrosis was found and treated with chemical debridement and healed by second intention, which proved to be sufficient on the 30th day. Dog 2. A half-moon rotation flap was performed, which closed the defect. Dog 3. A new procedure using the reporting theme technique was necessary in order to cover the cranial portion of the foreskin. The dehiscence present in dogs 2 and 3 was significant. Flap retraction was observed in all 3 cases. In dogs 1 and 3, the retraction was slight, and the exposure of a small portion of the penile glans were observed, showing no changes that required intervention. In dog 2, retraction was important, leading to partial stenosis of the preputial ostium. A larger ostium was obtained by suturing the mucosa to the edge of the wedge. Considering the possibility of adhesion formation, "captons" were made in sterile silicone tubes, and sutures were placed in the dorsal and ventral aspects to prevent adherence of the oral mucosa graft located on the inside of the new foreskin. The captons were removed on the tenth post-operative day, revealing a good opening of the preputial orifice and adequate penile exposure. Discussion: The absence of a foreskin caused by trauma or surgical excision leads to chronic penile exposure, dryness, and ulcerations. The simple covering of the skin with an axial-type flap of the caudal superficial epigastric region tends to fail since only the graft edges are sutured into the abdominal skin. In these circumstances, the subcutaneous region on the penis is exposed and comes in direct contact with urine and the penile mucosa, causing the flap skin to grow to exacerbated retraction. The transplantation of a free-lip mucosa graft allows the subcutaneous region of the transposed skin flap to create adhesions in the fenestrated regions of the lip tissue through the formation of granulation tissue buds, which is performed in a single stage. The permanence of the penis protects the lower urinary system from the occurrence of infections relative to what is normally observed in cases where partial or total penile amputation is practiced in combination with adjunctive scrotal urethrostomy. Given the observations of the 3 cases described here, the technique of pre-facial reconstruction with an axial skin flap of the caudal superficial epigastric region, combined with free-labial mucosa graft, was found to be feasible for the single-stage foreskin technique, but that paraphimosis remanagement may be necessary when cutaneous portions of the penile skin caudal to the glans are removed.

Morphological and morphometric characterization of the preputial ostium, internal preputial leaflet, and free part of the penises of Aberdeen Angus and Nellore bulls / [Caracterização morfológica e morfométrica do óstio prepucial, do folheto prepucial interno e da parte livre do pênis de touros Aberdeen Angus e Nelore]

The morphological characteristics of the external genitalia of the bull may contribute to the etiopathogenesis of preputial diseases that trigger the impotence coeundi and losses in farms. The goal of this study was to establish morphometric parameters of the preputial ostium, the internal preputial leaflet (IPL), the free part and glans of the penis; describe the histological characteristics of the IPL; perform a count of the preputial sebaceous glands and compare these variables between 24-month-old Aberdeen Angus and Nellore bulls. At the slaughterhouse, 20 preputial pieces were collected from each breed. A device composed of base, rod, ring, and funnel was designed to hold each suspended and distended part. The IPL, the free part of the penis and the glans were measured. The ostium diameter was measured, and the radius, perimeter, and area of the preputial ostium were calculated. Samples were collected from the dorsal and ventral regions and from the cranial, medial, and caudal portions of the IPL. By electronic and optical microscopy, IPL characterization and sebaceous gland counts were performed. Analysis of variance was performed using the F test at 5%. It was concluded that Nellore bulls have a more extensive IPL and free part of the penis and more preputial sebaceous glands than Aberdeen Angus bulls. In both breeds, there are more glands in the ventral region of the ostium.

As características morfológicas da genitália externa do touro podem contribuir para a etiopatogenia de enfermidades prepuciais que desencadeiam a impotência coeundi e prejuízos nos criatórios. O objetivo deste estudo foi estabelecer parâmetros morfométricos do óstio prepucial, do folheto prepucial interno (FPI), da parte livre e da glande do pênis; descrever as características histológicas do FPI; realizar contagem de glândulas sebáceas prepuciais; e comparar essas variáveis entre touros Aberdeen Angus e Nelore, com 24 meses de idade. No abatedouro, colheram-se 20 peças prepuciais de cada raça. Elaborou-se um dispositivo composto por base, haste, anel e funil para sustentar cada peça suspensa e distendida. Realizou-se medição do FPI, da parte livre do pênis e da glande. Aferiu-se diâmetro do óstio, e calculou-se o raio, o perímetro e a área do óstio prepucial. Colheram-se amostras nas regiões dorsal e ventral e das porções cranial, medial e caudal do FPI. Por microscopia eletrônica e óptica, fez-se a caracterização do FPI e a contagem de glândulas sebáceas. Realizou-se análise de variância pelo teste F a 5%. Concluiu-se que touros Nelore possuem o FPI e a parte livre do pênis mais extensos e mais glândulas sebáceas prepuciais que touros Aberdeen Angus. Nas duas raças, há mais glândulas na região ventral do óstio.

Penile fractures in young bulls raised in feedlots in Southern Brazil

Background: Penile fracture is a pathology of young cattle that perform precocious and disordered breeding. The incompatibility of height between males and females and sodomy between males cause a great pressure on the sigmoid flexure and retractor muscle of the penis, which are the main causes and sites of organ injury. This study aimed to describe the epidemiological and pathological aspects of penile fractures observed in young bulls raised in pre-export feedlots (PEFs) in southern Brazil. Cases: In 2 PEFs located in the municipalities of Pelotas (property 1) and Capão do Leão (property 2), 3 male cattle [1 from property 1 and 2 from property 2] presented subcutaneous edema in the foreskin and perineum, associated with dysuria. The evolution of the clinical picture was approximately 20 days in all cases, with evolution to death. The bovine necropsied on property 1 had an increased volume and inguinal edema, involving the penis and scrotal sac. Necrosis of the subcutaneous tissue and local musculature was also observed. The testicles were surrounded by the necrotic tissue, and the right testis was swollen, with flaccid parenchyma adhering to the tunica albuginea. In the necropsy of 1 bull from property 2, an increase in the inguinal volume was observed, with an extensive area of necrosis and edema extending from the prepuce to the caudal musculature of the scrotal sac. There were also marked varicosis in the sigmoid flexure and necrosis of the adjacent region, without the involvement of the corpus cavernosum. During the necropsy of the 2 young bulls, fragments of organs from the abdominal, thoracic, and brain cavities were collected and fixed in 10% buffered formalin. From the bull of the property 2, an anatomical piece consisting of the penis, prepuce, and testicles was also collected and fixed in 10% buffered formalin. After 48 h, the tissue samples were cleaved, embedded in paraffin, cut into 3-µm-thick sections, and stained using hematoxylin and eosin (HE). A histological evaluation of the penile lesions in both cattle revealed intense hemorrhage, congestion, and necrosis of the muscles and tissues adjacent to the corpus cavernosum. In addition to areas of dystrophic calcification, neutrophil and macrophage infiltration was also observed. In the bull from the property 1, an intense edema and proliferation of fibrous tissue surrounding the urethra were noted. There were also marked tubular degeneration and intense infiltration of neutrophils, lymphocytes, and macrophages in the inner portion of the tunica albuginea. Discussion: In the present cases, the diagnosis was based on epidemiological data associated with clinical signs and pathology. The macroscopic lesions observed were probably due to the involvement of blood vessels adjacent to the penis, which suffered trauma during sodomy mating among cattle. These lesions have been described in other reports of this pathology and in diseases, such as acropostitis-phimosis, fibropapilloma of the glans, preputial abscess, and urolithiasis, and the differential diagnosis of these diseases must be carried out, as they have different etiologies. In the bulls of the present study, no lesions were observed in the corpus cavernosum, and this condition was attributed to the presence of varicosis and accumulation of urine in the prepuce, due to the difficulty in exposing the penis. Histologically, there were intense hemorrhage, congestion, and necrosis of the muscles and tissues adjacent to the corpus cavernosum, with the infiltration of neutrophils and macrophages, and areas of dystrophic calcification. The presence of necrotic lesions in tissues adjacent to the penis may be related to hypoxia, vascular lesions, or the action of chemical elements present in the urine. In both cases, vascular lesions were present, which were attributed to the main triggering factor for the disease.

Parafimose canina recidivante: abordagem cirúrgica modificada / Recurrent canine paraphimosis: modified surgical approach

Background: Paraphimosis is characterized by persistent penile exposure, due to the inability to retract the penis into the prepuce. This persistent exposure of a non-erect penis might result from traumas, infections, neoplasia, anatomic or neurological alterations, or even occur in its idiopathic form. Surgical treatment is indicated when it is not possible to keep the penis covered by the foreskin by trying it manually. The surgical techniques described are efficient in small exposures, however, when these are over 1.5 cm, surgical success might become a challenge. The objective of this study is to report a modified surgical approach to solve a 5 cm recurrent paraphimosis in a dog. Case: A 1-year-old male unneutered mixed-breed dog, weighing 26 kg, was presented for examination with a history persistent paraphimosis background for around 2 months without apparent cause. The animal's tutor reported that it had been submitted to 2 unsuccessful surgical procedures. When the reproductive system was examined, the animal showed a flaccid penis with 5 cm exposure outside the foreskin. A conservative treatment was used, which was also unsuccessful. The next step was a surgical procedure that used the combination of techniques, namely, phallopexy, preputial advancement and reconstruction preputial opening with suture along with orchiectomy. After 10 days, dehiscence of the ostium stitches occurred, which required debridement and new suture. However, it was not efficient and recurrence of the paraphimosis was observed. After 1 month, a new surgery was performed by adapting the phallopexy technique, which was carried out bilaterally and associated to the reconstruction preputial opening with captonated suture, which presented a successful outcome. After 8 months as of the last procedure, the patient is healthy and has no signs of paraphimosis recurrence. Discussion: No consensus has been achieved regarding the paraphimosis treatment, and the resolution of such disorder remains a challenge. For this reason, some parameters should be considered to minimize failure when choosing the surgical technique and, consequently, the recurrence of such condition. Tissue viability, morphological alterations, time of exposure, previous surgeries, and the length of the penis exposure are some of the criteria that must be taken into consideration when choosing the surgical technique. In this case, the first choice was the association of techniques that included preputial advancement, phallopexy and suture preputial opening due to the fact that the exposure was over 1.5 cm and for the existence of a preputial ostium defect, which justified its suture. Despite these associations, paraphimosis recurrence was observed and some of the probable causes include the inadequate position of the penis inside the foreskin flap during the phallopexy and lack of preputial integrity in its ventral aspect. The preputial advancement performed was not sufficient to prevent the exposure or reduce it in the recurrence of the condition, showing that the shortening of preputial muscles and the skin tension might loosen up with time. The second surgery employed bilateral phallopexy without penis exposure to guarantee its correct position, more caudal within the foreskin at the moment of the fixation. The ostium captonated suture also had a relevant role in the tension distribution up to the full tissue healing. New surgical approaches might be needed to achieve success in the paraphimosis treatment. In this report, the length of the penis exposure and the ostium defect were complicating factors. However, the association of the modified surgical techniques resulted in a successful resolution of the condition.

Padronização do exame ultrassonográfico do prepúcio e da parte livre do pênis em bovinos / Standardization of ultrasound examination of the prepuce and free end of the bovine penis

A ultrassonografia é um exame complementar não invasivo ainda pouco utilizado na avaliação prepucial e sem descrições detalhadas da parte livre do pênis (PLP) de bovinos. Este estudo objetivou padronizar a ultrassonografia prepucial em bovinos hígidos da raça Nelore com um ano de idade e, para tanto, descreveu o aspecto da lâmina interna prepucial (LIP) e da PLP, determinando as principais janelas acústicas, a viabilidade da utilização de contraste no lúmen da cavidade prepucial (LCP) e o melhor posicionamento do animal para a realização do exame. O escaneamento foi realizado com os animais na posição quadrupedal e em decúbito lateral direito. Foram determinadas cinco janelas acústicas a partir do óstio até a identificação do recesso prepucial. Os escaneamentos foram realizados nos planos longitudinais, transversais e dorsais, antes e após a infiltração de solução fisiológica a 0,9% no LCP. Como conclusões, o exame ultrassonográfico permitiu identificar a LIP e a PLP em todos os planos e em todas as janelas acústicas propostas. O melhor ponto de referência é a identificação da glande. O posicionamento quadrupedal é mais adequado para a realização do exame e o uso de contraste é recomendado para delimitação topográfica das estruturas.(AU)

Ultrasonography is a noninvasive complementary exam that is still rarely used in the preputial evaluation and without detailed descriptions of the bovine free end of the penis. The purpose of this study was to standardize preputial ultrasonography in one-year-old healthy Nelore cattle, describing the main acoustic windows, the viability of using contrast in the preputial cavity and the best positioning of the animal for performing the ultrasound examination. The scanning was performed with the animals in standing and decubitus position. Five acoustic windows were determined from the preputial ostium to the preputial fornix, at the free end of the penis. The scans were performed in longitudinal, transverse and dorsal planes, before and after infiltration of 0.9% saline solution into the preputial cavity. As conclusions, the ultrasound examination is able to identify the internal layer and the free part of the penis in all proposed planes and acoustic windows. The best landmark is the identification of the glans. Furthermore, standing positioning is the most appropriate to perform the exam and the use of contrast is recommended for topographic delimitation of the structures.(AU)

Padronização do exame ultrassonográfico do prepúcio e da parte livre do pênis em bovinos / Standardization of ultrasound examination of the prepuce and free end of the bovine penis

A ultrassonografia é um exame complementar não invasivo ainda pouco utilizado na avaliação prepucial e sem descrições detalhadas da parte livre do pênis (PLP) de bovinos. Este estudo objetivou padronizar a ultrassonografia prepucial em bovinos hígidos da raça Nelore com um ano de idade e, para tanto, descreveu o aspecto da lâmina interna prepucial (LIP) e da PLP, determinando as principais janelas acústicas, a viabilidade da utilização de contraste no lúmen da cavidade prepucial (LCP) e o melhor posicionamento do animal para a realização do exame. O escaneamento foi realizado com os animais na posição quadrupedal e em decúbito lateral direito. Foram determinadas cinco janelas acústicas a partir do óstio até a identificação do recesso prepucial. Os escaneamentos foram realizados nos planos longitudinais, transversais e dorsais, antes e após a infiltração de solução fisiológica a 0,9% no LCP. Como conclusões, o exame ultrassonográfico permitiu identificar a LIP e a PLP em todos os planos e em todas as janelas acústicas propostas. O melhor ponto de referência é a identificação da glande. O posicionamento quadrupedal é mais adequado para a realização do exame e o uso de contraste é recomendado para delimitação topográfica das estruturas.(AU)

Ultrasonography is a noninvasive complementary exam that is still rarely used in the preputial evaluation and without detailed descriptions of the bovine free end of the penis. The purpose of this study was to standardize preputial ultrasonography in one-year-old healthy Nelore cattle, describing the main acoustic windows, the viability of using contrast in the preputial cavity and the best positioning of the animal for performing the ultrasound examination. The scanning was performed with the animals in standing and decubitus position. Five acoustic windows were determined from the preputial ostium to the preputial fornix, at the free end of the penis. The scans were performed in longitudinal, transverse and dorsal planes, before and after infiltration of 0.9% saline solution into the preputial cavity. As conclusions, the ultrasound examination is able to identify the internal layer and the free part of the penis in all proposed planes and acoustic windows. The best landmark is the identification of the glans. Furthermore, standing positioning is the most appropriate to perform the exam and the use of contrast is recommended for topographic delimitation of the structures.(AU)

Microbiome and antimicrobial resistance in members of the Enterobacteriaceae family from vaginal and preputial mucous isolates of stray dogs

Background: Contact between humans and pets, mainly dogs and cats, has been increasing in recent years, which may result in the spread of infectious agents to new hosts and even to the environment, causing emergencies of national and international interest. The aim of this work was to understand the phenotypic profile of bacteria of the Enterobacteriaceae family of vaginal and preputial mucous of stray dogs from a border region. Materials, Methods & Results: Swab samples from the vaginal and preputial mucosa of stray dogs from two border regions were collected for later bacterial isolation, biochemical identification of bacterial isolates, susceptibility tests to different antimicrobials, and determination of the bacterial resistance index. Samples were collected from 70 animals, was possible to isolate 88 samples, of which 36 (40.9%) presented isolates of Gram-negative bacteria, with Escherichia coli being the most prevalent species (44.8%), followed by Obesumbacterium proteus in eight (27.5%); Enterobacter aerogenes and Enterobacter cloacae in two (6.8%); and Erwinia herbicola, Koserella trabulsii, Proteus mirabilis, and Serratia rubidaea (3.4%) from one isolate. The most resistant antimicrobials Clindamycin (100%), Metronidazole (100%), Oxacillin (100%), and Penicillin (100%) were tested against the vaginal and preputial samples and when the multidrug resistance index of the isolates was analyzed, all were classified as presenting a public health risk. Discussion: The results of this work suggest that stray dogs may be considered potential reservoirs of resistant pathogenic microorganisms, enabling future health problems due to the close coexistence of tutors with their dogs. It is known that the microorganisms that inhabit a certain environment or a specific part of the body are collectively called microbiomes. More specifically, some of them are bacteria that inhabit the reproductive mucous...

Preputial repair as an alternative to penectomy in dogs - report of two cases / Reconstrução prepucial como alternativa à penectomia em cães - relato de dois casos

Extensive foreskin and penile lesions are the main indications of penectomy in the dog. Such a surgical approach results in high morbidity and risk of infection. A viable alternative to penectomy comprises preputial reconstruction after resection of extensive benign lesions. The aim of this study was to report the case of two dogs with extensive preputial lesions submitted to different reconstructive foreskin techniques. In both cases there were no postoperative complications, the animals did not present difficulty for penile exposure or retraction. Therefore, the techniques used in the present study are viable as alternative techniques to replace the penectomy.(AU)

Lesões extensas em prepúcio e pênis constituem as principais indicações de penectomia no cão. Tal abordagem cirúrgica resulta em elevada morbidade e risco de infecção. Uma alternativa viável à penectomia compreende a reconstrução prepucial após a ressecção de lesões extensas benignas. O objetivo deste estudo foi relatar o caso de dois cães com lesões prepuciais extensas, submetidos a diferentes técnicas reconstrutivas de prepúcio. Nos dois casos não foram verificadas complicações pós-operatórias, os animais não apresentaram dificuldade para exposição ou retração peniana. Diante disso, as técnicas utilizadas no presente estudo são viáveis como técnicas alternativas em substituição à penectomia.(AU)

Preputial repair as an alternative to penectomy in dogs - report of two cases / Reconstrução prepucial como alternativa à penectomia em cães - relato de dois casos

Extensive foreskin and penile lesions are the main indications of penectomy in the dog. Such a surgical approach results in high morbidity and risk of infection. A viable alternative to penectomy comprises preputial reconstruction after resection of extensive benign lesions. The aim of this study was to report the case of two dogs with extensive preputial lesions submitted to different reconstructive foreskin techniques. In both cases there were no postoperative complications, the animals did not present difficulty for penile exposure or retraction. Therefore, the techniques used in the present study are viable as alternative techniques to replace the penectomy.

Lesões extensas em prepúcio e pênis constituem as principais indicações de penectomia no cão. Tal abordagem cirúrgica resulta em elevada morbidade e risco de infecção. Uma alternativa viável à penectomia compreende a reconstrução prepucial após a ressecção de lesões extensas benignas. O objetivo deste estudo foi relatar o caso de dois cães com lesões prepuciais extensas, submetidos a diferentes técnicas reconstrutivas de prepúcio. Nos dois casos não foram verificadas complicações pós-operatórias, os animais não apresentaram dificuldade para exposição ou retração peniana. Diante disso, as técnicas utilizadas no presente estudo são viáveis como técnicas alternativas em substituição à penectomia.

Carcinoma de glândulas hepatoides em caninos / Hepatoid gland carcinoma in dogs

O carcinoma de glândulas hepatoides é uma neoplasia maligna, de origem epitelial, que acomete cães machos inteiros e com idade avançada. O presente trabalho relata o caso de dois caninos machos, o primeiro da raça Teckel e o segundo sem raça definida, 13 anos e 15 anos de idade respectivamente, o segundo apresentando sintomas de hematúria e piúria, com histórico de ectoparasitismo e que apresentavam nódulo em região de prepúcio. Foram realizados exames pré-operatórios e de pesquisa de metástase os quais não indicaram nada digno de nota. Houve o direcionamento para a realização de excisão cirúrgica dos nódulos os quais foram encaminhados para histopatologia e tiveram como diagnóstico morfológico o carcinoma de glândulas hepatoides.

Hepatoid gland carcinoma is a malignant neoplasm of epithelial origin that affects whole male dogs with advanced age. The present study reports the case of two male canines, the first of the Teckel breed and the second of no defined breed, 13 years and 15 years of age respectively, the second presenting symptoms of hematuria and pyuria, with a history of ectoparasitism and who presented with a nodule in foreskin region. Preoperative and metastatic research examinations were performed which indicated nothing of note. The patients were referred for surgical excision of the nodules, which were referred for histopathology and their morphological diagnosis was carcinoma of the hepatoid glands.

Development of the urinary system in guinea pig females (Cavia porcellus)

ABSTRACT: Guinea pigs are animal models widely used in research related to developmental biology. The objective of this work was to demonstrate the process of formation and differentiation of urinary organs in females of the species in the prenatal period. Four females were used at 25, 30, 45 and >65 DG (days of gestation). The animals were dissected, and then macroscopic and microscopic descriptions of the urinary organs were performed. At 25 DG metanephros were present in the urogenital crest into the abdominal cavity. Collecting ducts and glomerular precursor cells could be visualized. After this period, metanephros underwent microstructural modifications to form the kidneys at the end of the prenatal period. After 30 DG, the renal parenchyma already had a cortex, where the glomerulus and proximal convoluted tubules were present; and the medulla, where distal convoluted tubules, collecting ducts, and pelvis were present. The pelvis of each kidney was drained by the ureters. The ureters also underwent tissue differentiation to be differentiated (mucosa with transitional epithelium and lamina propria of connective tissue, muscular, and adventitia) at the end of the prenatal period. The urinary vesicle also underwent tissue changes to form the tunics similar to those found in the ureters, with emphasis on the greater volume of the muscular tunica and the lamina propria that constituted the submucosa in this organ. The pelvic urethra was evidenced by a mucosa lined by transitional epithelium, submucosa, muscular and adventitia. Finally, a partial clitoral urethra and a urethral meatus in the prepuce of the clitoris were also evidenced. The urethral channel began to form with the emergence of the urethral plate and the urethral groove at 30 DG and thereafter with the fusion of the urethral folds to form a partially channeled urethra in the clitoris. A urethral meatus was observed in the most distal portion of the clitoral tissue, formed by the fusion of the prepuce. It is concluded that the urinary organs of guinea pig have similar development to that described in domestic animals, except for the partial clitoral urethra and evident urethral meatus.

RESUMO: Os porquinhos-da-índia são modelos animais amplamente utilizados em pesquisas relacionadas a biologia do desenvolvimento. O objetivo deste trabalho foi demonstrar o processo de formação e diferenciação dos órgãos urinários em fêmeas da espécie no período pré-natal. Foram utilizadas quatro fêmeas aos 25, 30, 45 e >65 DG (dias de gestação). Os animais foram dissecados e então, realizaram-se descrições macroscópicas e microscópicas dos órgãos urinários. Aos 25 DG os metanefros estavam presentes na crista urogenital da cavidade abdominal. Podiam ser visualizados ductos coletores e células precursoras glomerulares. Após este período, os metanefros sofreram modificações microestruturais para formar os rins ao final do período pré-natal. Após os 30 DG, o parênquima renal já apresentava um córtex, onde estavam presentes os glomérulos e túbulos convolutos proximais, e a medula onde estavam presentes túbulos convolutos distais, ductos coletores e a pelve. A pelve de cada rim era drenada pelos ureteres. Os ureteres também sofreram diferenciação tecidual para estarem com suas túnicas diferenciadas (mucosa com epitélio de transição e lâmina própria de tecido conjuntivo; muscular; e, adventícia) ao final do período pré-natal. A vesícula urinária também passou por modificações teciduais para formar as túnicas semelhantes as dos ureteres, com destaque para o maior volume da túnica muscular e a lâmina própria que constituiu a submucosa neste órgão. Uma uretra pélvica foi evidenciada por uma mucosa revestida por epitélio de transição, submucosa, muscular e adventícia. Por último, uma uretra parcialmente clitoriana e um meato uretral no prepúcio do clitóris também foi evidenciado. O canal uretral começou a se formar com o aparecimento da placa uretral e do sulco uretral aos 30 DG e posteriormente com a fusão das pregas uretrais para formar uma uretra parcialmente canalizada no clitóris. Observou-se um meato uretral na porção mais distal do tecido clitoriano, formado pela fusão do prepúcio. Conclui-se que os órgãos urinários do porquinho-da-índia possuem desenvolvimento semelhante ao descrito em animais domésticos, com exceção da uretra parcialmente clitoriana e do meato uretral evidente.

Correlação entre as características de escores visuais com o peso à desmama em bovinos da raça Brangus / Correlation between traits of visual scores with weaning weight in Brangus cattle

A seleção genética através de programas baseados em avaliação dos escores visuais, tanto no período de desmame quanto ao sobreano, é um modo de controle e melhoramento do rebanho de fácil aplicação e baixo custo, capaz de gerar ganhos genéticos ao longo dos anos de utilização. No presente estudo foram utilizados dados de 93 machos desmamados no ano de 2017 pertencentes a Estância GAP São Pedro. Também foi calculada através do programa BioEstat 5.3, a correlação pelo método de Spearmann dos escores de P, M, U entre si e dos mesmos com o peso à desmama. Os resultados demonstraram a associação positiva entre o peso corporal e os escores de precocidade e musculatura.

Genetic selection through programs based on visual score evaluation, both during weaning and yearling, is a low cost and easy to apply herd control and genetic selection method, capable of generating genetic results in over the years. In the present study, data gathered from 93 weaned males were used in 2017, belonging to the Estância GAP São Pedro. It was also calculated through the program BioEstat 5.3, a correlation by the Spearmann method of the scores of Precocity, Musculature, Prepuce and each other with weight on weaning. The results demonstrated the positive association between body weight and precocity and musculature scores.

Correlação entre as características de escores visuais com o peso à desmama em bovinos da raça Brangus / Correlation between traits of visual scores with weaning weight in Brangus cattle

A seleção genética através de programas baseados em avaliação dos escores visuais, tanto no período de desmame quanto ao sobreano, é um modo de controle e melhoramento do rebanho de fácil aplicação e baixo custo, capaz de gerar ganhos genéticos ao longo dos anos de utilização. No presente estudo foram utilizados dados de 93 machos desmamados no ano de 2017 pertencentes a Estância GAP São Pedro. Também foi calculada através do programa BioEstat 5.3, a correlação pelo método de Spearmann dos escores de P, M, U entre si e dos mesmos com o peso à desmama. Os resultados demonstraram a associação positiva entre o peso corporal e os escores de precocidade e musculatura.(AU)

Genetic selection through programs based on visual score evaluation, both during weaning and yearling, is a low cost and easy to apply herd control and genetic selection method, capable of generating genetic results in over the years. In the present study, data gathered from 93 weaned males were used in 2017, belonging to the Estância GAP São Pedro. It was also calculated through the program BioEstat 5.3, a correlation by the Spearmann method of the scores of Precocity, Musculature, Prepuce and each other with weight on weaning. The results demonstrated the positive association between body weight and precocity and musculature scores.(AU)

Development of the urinary system in guinea pig females (Cavia porcellus) / Desenvolvimento do sistema urinário em fêmeas de porquinhos-da-índia (Cavia porcellus)

Guinea pigs are animal models widely used in research related to developmental biology. The objective of this work was to demonstrate the process of formation and differentiation of urinary organs in females of the species in the prenatal period. Four females were used at 25, 30, 45 and >65 DG (days of gestation). The animals were dissected, and then macroscopic and microscopic descriptions of the urinary organs were performed. At 25 DG metanephros were present in the urogenital crest into the abdominal cavity. Collecting ducts and glomerular precursor cells could be visualized. After this period, metanephros underwent microstructural modifications to form the kidneys at the end of the prenatal period. After 30 DG, the renal parenchyma already had a cortex, where the glomerulus and proximal convoluted tubules were present; and the medulla, where distal convoluted tubules, collecting ducts, and pelvis were present. The pelvis of each kidney was drained by the ureters. The ureters also underwent tissue differentiation to be differentiated (mucosa with transitional epithelium and lamina propria of connective tissue, muscular, and adventitia) at the end of the prenatal period. The urinary vesicle also underwent tissue changes to form the tunics similar to those found in the ureters, with emphasis on the greater volume of the muscular tunica and the lamina propria that constituted the submucosa in this organ. The pelvic urethra was evidenced by a mucosa lined by transitional epithelium, submucosa, muscular and adventitia. Finally, a partial clitoral urethra and a urethral meatus in the prepuce of the clitoris were also evidenced. The urethral channel began to form with the emergence of the urethral plate and the urethral groove at 30 DG and thereafter with the fusion of the urethral folds to form a partially channeled urethra in the clitoris. A urethral meatus was observed in the most distal portion of the clitoral tissue, formed by the fusion of the prepuce. It is concluded that the urinary organs of guinea pig have similar development to that described in domestic animals, except for the partial clitoral urethra and evident urethral meatus.(AU)

Os porquinhos-da-índia são modelos animais amplamente utilizados em pesquisas relacionadas a biologia do desenvolvimento. O objetivo deste trabalho foi demonstrar o processo de formação e diferenciação dos órgãos urinários em fêmeas da espécie no período pré-natal. Foram utilizadas quatro fêmeas aos 25, 30, 45 e >65 DG (dias de gestação). Os animais foram dissecados e então, realizaram-se descrições macroscópicas e microscópicas dos órgãos urinários. Aos 25 DG os metanefros estavam presentes na crista urogenital da cavidade abdominal. Podiam ser visualizados ductos coletores e células precursoras glomerulares. Após este período, os metanefros sofreram modificações microestruturais para formar os rins ao final do período pré-natal. Após os 30 DG, o parênquima renal já apresentava um córtex, onde estavam presentes os glomérulos e túbulos convolutos proximais, e a medula onde estavam presentes túbulos convolutos distais, ductos coletores e a pelve. A pelve de cada rim era drenada pelos ureteres. Os ureteres também sofreram diferenciação tecidual para estarem com suas túnicas diferenciadas (mucosa com epitélio de transição e lâmina própria de tecido conjuntivo; muscular; e, adventícia) ao final do período pré-natal. A vesícula urinária também passou por modificações teciduais para formar as túnicas semelhantes as dos ureteres, com destaque para o maior volume da túnica muscular e a lâmina própria que constituiu a submucosa neste órgão. Uma uretra pélvica foi evidenciada por uma mucosa revestida por epitélio de transição, submucosa, muscular e adventícia. Por último, uma uretra parcialmente clitoriana e um meato uretral no prepúcio do clitóris também foi evidenciado. O canal uretral começou a se formar com o aparecimento da placa uretral e do sulco uretral aos 30 DG e posteriormente com a fusão das pregas uretrais para formar uma uretra parcialmente canalizada no clitóris. Observou-se um meato uretral na porção mais distal do tecido clitoriano, formado pela fusão do prepúcio. Conclui-se que os órgãos urinários do porquinho-da-índia possuem desenvolvimento semelhante ao descrito em animais domésticos, com exceção da uretra parcialmente clitoriana e do meato uretral evidente.(AU)

Development of the urinary system in guinea pig females (Cavia porcellus) / Desenvolvimento do sistema urinário em fêmeas de porquinhos-da-índia (Cavia porcellus)

Guinea pigs are animal models widely used in research related to developmental biology. The objective of this work was to demonstrate the process of formation and differentiation of urinary organs in females of the species in the prenatal period. Four females were used at 25, 30, 45 and >65 DG (days of gestation). The animals were dissected, and then macroscopic and microscopic descriptions of the urinary organs were performed. At 25 DG metanephros were present in the urogenital crest into the abdominal cavity. Collecting ducts and glomerular precursor cells could be visualized. After this period, metanephros underwent microstructural modifications to form the kidneys at the end of the prenatal period. After 30 DG, the renal parenchyma already had a cortex, where the glomerulus and proximal convoluted tubules were present; and the medulla, where distal convoluted tubules, collecting ducts, and pelvis were present. The pelvis of each kidney was drained by the ureters. The ureters also underwent tissue differentiation to be differentiated (mucosa with transitional epithelium and lamina propria of connective tissue, muscular, and adventitia) at the end of the prenatal period. The urinary vesicle also underwent tissue changes to form the tunics similar to those found in the ureters, with emphasis on the greater volume of the muscular tunica and the lamina propria that constituted the submucosa in this organ. The pelvic urethra was evidenced by a mucosa lined by transitional epithelium, submucosa, muscular and adventitia. Finally, a partial clitoral urethra and a urethral meatus in the prepuce of the clitoris were also evidenced. The urethral channel began to form with the emergence of the urethral plate and the urethral groove at 30 DG and thereafter with the fusion of the urethral folds to form a partially channeled urethra in the clitoris. A urethral meatus was observed in the most distal portion of the clitoral tissue, formed by the fusion of the prepuce. It is concluded that the urinary organs of guinea pig have similar development to that described in domestic animals, except for the partial clitoral urethra and evident urethral meatus.(AU)

Os porquinhos-da-índia são modelos animais amplamente utilizados em pesquisas relacionadas a biologia do desenvolvimento. O objetivo deste trabalho foi demonstrar o processo de formação e diferenciação dos órgãos urinários em fêmeas da espécie no período pré-natal. Foram utilizadas quatro fêmeas aos 25, 30, 45 e >65 DG (dias de gestação). Os animais foram dissecados e então, realizaram-se descrições macroscópicas e microscópicas dos órgãos urinários. Aos 25 DG os metanefros estavam presentes na crista urogenital da cavidade abdominal. Podiam ser visualizados ductos coletores e células precursoras glomerulares. Após este período, os metanefros sofreram modificações microestruturais para formar os rins ao final do período pré-natal. Após os 30 DG, o parênquima renal já apresentava um córtex, onde estavam presentes os glomérulos e túbulos convolutos proximais, e a medula onde estavam presentes túbulos convolutos distais, ductos coletores e a pelve. A pelve de cada rim era drenada pelos ureteres. Os ureteres também sofreram diferenciação tecidual para estarem com suas túnicas diferenciadas (mucosa com epitélio de transição e lâmina própria de tecido conjuntivo; muscular; e, adventícia) ao final do período pré-natal. A vesícula urinária também passou por modificações teciduais para formar as túnicas semelhantes as dos ureteres, com destaque para o maior volume da túnica muscular e a lâmina própria que constituiu a submucosa neste órgão. Uma uretra pélvica foi evidenciada por uma mucosa revestida por epitélio de transição, submucosa, muscular e adventícia. Por último, uma uretra parcialmente clitoriana e um meato uretral no prepúcio do clitóris também foi evidenciado. O canal uretral começou a se formar com o aparecimento da placa uretral e do sulco uretral aos 30 DG e posteriormente com a fusão das pregas uretrais para formar uma uretra parcialmente canalizada no clitóris. Observou-se um meato uretral na porção mais distal do tecido clitoriano, formado pela fusão do prepúcio. Conclui-se que os órgãos urinários do porquinho-da-índia possuem desenvolvimento semelhante ao descrito em animais domésticos, com exceção da uretra parcialmente clitoriana e do meato uretral evidente.(AU)

Testicular interstitial cell tumor with disseminated cutaneous metastasis in a dog

Background: Although testicular tumors commonly develop in the genital tract of dogs, only few studies have reportedabout metastatic testicular tumors in dogs to date. Therefore, the present study aimed to describe the gross, histopathological, and immunohistochemical findings in a dog with metastatic interstitial cell tumor.Case: A 6-year-old male Beagle underwent clinical examination due to enlargement of the left testicle and nodules inthe skin of the left inguinal region and of the scrotum. The left testicle was cryptorchid (inguinal), and the right testiclewas intrascrotal. Both testicles and affected skin fragments were surgically removed. The right testicle was normal insize and did not exhibit gross changes. However, the left testicular parenchyma had been completely replaced by a firm,grayish-to-white neoplastic mass with an irregular surface. The inguinal and scrotal skin fragments were thickened by theneoplastic masses. Histologically, the left testicular parenchyma was completely obliterated by a neoplastic mass consistingof round-to-oval and polygonal cells. The neoplastic cells generally had abundant eosinophilic cytoplasm with indistinctcell limits. The nuclei were round and small, with aggregated chromatin. However, some cells exhibited high degrees ofatypia and pleomorphism and large nuclei with granular chromatin. Mitotic figures were observed at high frequenciesof up to 11 per high-power field (400×). The mass in the left testicle was diagnosed as malignant interstitial cell tumor.The sections of the inguinal skin and scrotum presented with neoplastic cells similar to those observed in the left testicle,which is consistent with the metastasis of the malignant testicular interstitial cell tumor. On the basis of necropsy, multiple cutaneous and subcutaneous nodules were randomly distributed throughout the body, primarily in the prepuce, head,and limbs. Histological evaluations of the skin nodules...

Testicular interstitial cell tumor with disseminated cutaneous metastasis in a dog

Background: Although testicular tumors commonly develop in the genital tract of dogs, only few studies have reportedabout metastatic testicular tumors in dogs to date. Therefore, the present study aimed to describe the gross, histopathological, and immunohistochemical findings in a dog with metastatic interstitial cell tumor.Case: A 6-year-old male Beagle underwent clinical examination due to enlargement of the left testicle and nodules inthe skin of the left inguinal region and of the scrotum. The left testicle was cryptorchid (inguinal), and the right testiclewas intrascrotal. Both testicles and affected skin fragments were surgically removed. The right testicle was normal insize and did not exhibit gross changes. However, the left testicular parenchyma had been completely replaced by a firm,grayish-to-white neoplastic mass with an irregular surface. The inguinal and scrotal skin fragments were thickened by theneoplastic masses. Histologically, the left testicular parenchyma was completely obliterated by a neoplastic mass consistingof round-to-oval and polygonal cells. The neoplastic cells generally had abundant eosinophilic cytoplasm with indistinctcell limits. The nuclei were round and small, with aggregated chromatin. However, some cells exhibited high degrees ofatypia and pleomorphism and large nuclei with granular chromatin. Mitotic figures were observed at high frequenciesof up to 11 per high-power field (400×). The mass in the left testicle was diagnosed as malignant interstitial cell tumor.The sections of the inguinal skin and scrotum presented with neoplastic cells similar to those observed in the left testicle,which is consistent with the metastasis of the malignant testicular interstitial cell tumor. On the basis of necropsy, multiple cutaneous and subcutaneous nodules were randomly distributed throughout the body, primarily in the prepuce, head,and limbs. Histological evaluations of the skin nodules...(AU)

Carcinoma de células escamosas em prepúcio e glande de um bovino

O carcinoma de células escamosas é uma neoplasia maligna que se origina na camada epidérmica da pele a partir da diferenciação de queratinócitos. Apresenta alta incidência em cães, gatos, equinos e bovinos. Descreve-se o caso de um touro da raça Nelore, mocho, com idade superior a 36 meses e peso médio 850 kg, localizado no município de São Felipe do Oeste RO na propriedade Sempre Seguros pecuária. Foi relatado baixo rendimento de cobertura. Ao exame clínico foi observada uma lesão na glande e prepúcio, iniciando tratamento anti-inflamatório e antimicrobiano sem observar melhor alguma. Foi indicado biópsia para exame histopatológico sendo diagnosticado como tumor de células escamosas. O animal foi descartado para reprodução.