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1.
Open Vet J ; 12(4): 502-507, 2022.
Article in English | MEDLINE | ID: mdl-36118721

ABSTRACT

Background: Secretory carcinoma is a rare histological type of breast neoplasm in humans and dogs that is characterized by the presence of intracellular and extracellular eosinophilic secretions. Case Description: In this case report, we describe the cytological, histological, and immunohistochemical characteristics of secretory mammary carcinoma in a 10-year-old mixed-breed female dog with nodal and bone metastases. The bitch had a history of claudication and a mass in the left humeral scapular region, which revealed osteolysis of the proximal humerus on radiography. Fine-needle aspiration cytology revealed numerous neoplastic cells arranged mostly in cohesive groups but sometimes isolated, that contained cytoplasmic vacuoles and had a moderate-to-high nucleus: cytoplasm ratio with frequent karyomegaly and evident nucleoli. Histologically, the neoplasm was organized in solid, tubular structures with luminal spaces filled with eosinophilic secretions and was composed of cells with clear cytoplasm and prominent vacuoles that pushed the nuclei to the periphery, resembling signet ring cells. The extracellular and intracytoplasmic material of the epithelial cells was positive for periodic acid-Schiff staining and immunoreactive for alpha-lactalbumin. Two chemotherapy sessions were performed, but 1 month after surgery, the clinical condition worsened, and euthanasia was elected, accounting for 133 days of survival after surgical removal of the tumor. Conclusion: The bitch presented with secretory mammary carcinoma with nodal and bone metastases, and histological and immunohistochemical characteristics were important for diagnosis. The morphological and immunohistochemical characteristics of this carcinoma were similar to those observed in humans. Mammary gland secretory carcinoma with bone metastasis must be included as a differential diagnosis among canine mammary gland carcinomas showing cellular morphological characteristics of intracytoplasmic vacuolization and eosinophilic secretion.


Subject(s)
Bone Neoplasms , Breast Neoplasms , Carcinoma , Dog Diseases , Animals , Bone Neoplasms/diagnosis , Bone Neoplasms/veterinary , Breast Neoplasms/veterinary , Carcinoma/diagnosis , Carcinoma/pathology , Carcinoma/veterinary , Dog Diseases/diagnosis , Dog Diseases/pathology , Dogs , Female , Humans , Lactalbumin , Periodic Acid
2.
Arq. Ciênc. Vet. Zool. UNIPAR (Online) ; 23(2, cont.): e2313, jul-dez. 2020. ilus
Article in Portuguese | LILACS, VETINDEX | ID: biblio-1141385

ABSTRACT

Heterotopic polyodontia have been described in most domestic species. Known as a dentigerous cyst but appropriately called heterotopic polyiodontics, it rarely occurs in horses, however it is easily recognized as a congenital defect. The cysts usually associated with this condition contain part or all of dental structures. The heterotopic tooth or dental structure is usually adhered to the temporal bone and surrounded by a secretory membrane, with a accumulation of exudate and draining tract along the proximal pinna or directly over the cyst. This case report describes in a 2.5-year-old female quarter horse, weighing 430 kg, with a heterotopic polyodontia that contained two easily small's identifiable dental structures, presented for evaluation of a chronic intermittent mucopurulent exudate discharge from the right sub-auricular region in the mastoid process of the temporal bone and a drainage tract near the right pinna. The diagnosis is established with clinical, radiographic, ultrasound and confirmed by histopathological examination of the structures removed. The cystic capsule was surgically removed, measuring approximately 3.0 x 2.3 cm in diameter, filled with mucopurulent exudate and containing two dental structures within 0.5 cm in diameter and 0.2 cm in diameter. Microscopic examination revealed a cystic area covered by stratified squamous epithelium with a lympho-histio-plasmatic cell infiltrate in the dermis, which was compatible with heterotopic polyodontia. Postoperatively, there were no neuromotor sequelae and wound healing evolved positively.(AU)


A poliodontia heterotópica tem sido descrita na maioria das espécies domésticas. Conhecido como cisto dentígero, mas apropriadamente denominado poliodontia heterotópica, raramente ocorre em equinos, porém é facilmente reconhecido como defeito congênito. Os cistos geralmente associados a essa condição contêm parte ou toda as estruturas dentarias. O dente heterotópico ou estrutura dentaria é comumente encontrado aderido ao osso temporal e envolvido por uma membrana secretora, com acúmulo de exsudato e trajeto de drenagem ao longo do pavilhão auricular proximal ou diretamente sobre o cisto. Este relato descreve um caso de em um equino,fêmea, quarto de milha, com 2,5 anos de idade, pesando 430 kg, com poliodontia heterotópica que continha duas estruturas dentarias facilmente indentificadas, apresentando um orifício na região sub-auricular direita no processo mastóideo do osso temporal, com secreção mucopurulenta intermitente e crônica, próximo ao pavilhão auricular direito. O diagnóstico foi estabelecido com exame clínico, radiográfico, ultrassonográfico e confirmado pelo exame histopatológico das estruturas retiradas. A cápsula cística foi removida cirurgicamente medindo aproximadamente 3,0 x 2,3 cm de diâmetro, preenchida com exsudato mucopurulento e contendo em seu interior duas estruturas dentárias medindo cerca de 0,5 cm de diâmetro e 0,2 cm de diâmetro. O exame microscópico revelou área cística revestida por epitélio escamoso estratificado com infiltrado linfo-histo-plasmocitário na derme, compatível com poliodontia heterotópica. No pós-operatório não houve sequelas neuromotoras e a cicatrização da ferida evoluiu positivamente.(AU)


La poliodontia heterotópica ha sido descrita en la mayoría de las especies domésticas. Conocido como quiste dentígero, pero apropiadamente llamado poliodontia heterotópica, raramente ocurre en equinos, sin embargo se reconoce fácilmente como un defecto congénito. Los quistes generalmente asociados a esa condición contienen parte o la totalidad de las estructuras dentales. El diente heterotópico o estructura dental se encuentra comúnmente adherido al hueso temporal y rodeado por una membrana secretora, con acumulación de exudado y vía de drenaje a lo largo del pabellón auricular proximal o directamente sobre el quiste. En este informe se describe el caso de una hembra, cuarto de milla, de 2,5 años de edad, con 430 kg de peso, presentando poliodontia heterotópica que contenía dos estructuras dentales fácilmente identificables, con un orificio en la región subauricular derecha en el proceso mastoides del hueso temporal, secreción mucopurulenta intermitente y crónica próximo al oído derecho. El diagnóstico se estableció con examen clínico, radiográfico, ecográfico y se confirmó con el examen histopatológico de las estructuras extirpadas. La cápsula quística se extrajo quirúrgicamente midiendo aproximadamente 3,0 x 2,3 cm de diámetro, rellena con exudado mucopurulento y conteniendo en su interior dos estructuras dentales que medían aproximadamente 0,5 cm de diámetro y 0,2 cm de diámetro. El examen microscópico reveló una zona quística cubierta por un epitelio escamoso estratificado con infiltrado linfo-histo-plasmocítico en la dermis, compatible con poliodontia heterotópica. En el postoperatorio no se produjeron secuelas neuromotoras y la cicatrización de la herida evolucionó positivamente.(AU)


Subject(s)
Animals , Female , Tooth , Dentigerous Cyst/diagnosis , Horses/injuries
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