RESUMEN
Vulvar lymphangioma circumscriptum (LC) is an unusual benign condition, congenital or acquired, related to interference in the lymph drainage. Acquired cases are usually related to oncological surgical procedures. We report 6 cases of vulvar LC: 3 have been caused by surgery and radiotherapy for gynecologic cancer, whereas the other 3 have originated under benign conditions--Crohn disease, recurring episodes of cellulits, and lower limb lymphedema. In 3 of them, the initial clinical diagnosis was genital wart. Surgical exeresis was performed as the treatment of choice in 5 patients and there were 3 cases of recurrences. Diagnosis of this unusual condition is not always easy even after histopathologic examination. The possibility of vulvar LC should be taken into account as a possible diagnosis in patients with previous oncological surgery or genital warts refractory to the conventional treatment. In these cases, a biopsy of not only the epidermis but also the superficial dermis is recommendable to rule out inflammatory or tumoral processes. Knowledge on the features of this lesion can avoid unnecessary clinical and therapeutic procedures.
Asunto(s)
Condiloma Acuminado/complicaciones , Enfermedad de Crohn/complicaciones , Linfangioma/patología , Neoplasias de la Vulva/patología , Adulto , Anciano , Femenino , Estudios de Seguimiento , Humanos , Persona de Mediana Edad , Recurrencia Local de NeoplasiaRESUMEN
OBJECTIVE: To describe two cases of a rare type of renal tumor , mucinous tubular and spindle cell carcinoma (MTSC), with different pathologic features. METHODS: We present: 1) the case of a 36 year-old woman 24-week pregnant, in whom during an examination for a renal colic we discovered a 5.5 cm tumor in the lower pole of the left kidney. 2) A 71-year-old woman that consulted to her doctor due to loss of weight (5 kg) and anorexia. A 15 x 12 x 9.5 cm tumor was found in her left kidney. RESULTS: Radical nephrectomy was performed in both cases. Microscopic examination showed a myxoid matrix containing a proliferation of tubules and spindle cells, with low-grade atypia. Cells were immunoreactive for CK7, racemase, EMA and vimentin and negative for CD10. Case 1 had some foci of papillary morphology, and was pT1. Case 2 had some nests of clear cells and invaded the sinus fat focally. It was staged as pT3a. In April 2012, the patients are alive without evidence of recurrence or metastasis after 13.5 years (case 1) and 8 months (case 2) of follow up. CONCLUSIONS: MTSC is a rare type of renal carcinoma, which can appear with different clinical, gross and microscopic features. This tumor seems to share some morphological and immunohistochemical similarities with renal papillary carcinoma, and the differential diagnosis is difficult. The vast majority of cases reported had favourable evolution, like our case 1, although a remote possibility of metastasis exists, in cases with sarcomatoid differentiation, but even without it.
Asunto(s)
Adenocarcinoma Mucinoso , Carcinoma de Células Renales , Neoplasias Renales , Adenocarcinoma Mucinoso/diagnóstico , Adulto , Anciano , Carcinoma de Células Renales/diagnóstico , Femenino , Humanos , Inmunohistoquímica , Neoplasias Renales/diagnóstico , Recurrencia Local de NeoplasiaRESUMEN
BACKGROUND: Paracentrotus lividus is the most common variety of sea urchin in the west coasts of Spain and has commercial value for the alimentary industry. Puncture with the spine of its rigid external skeleton may cause mechanical injury by skin penetration. It causes immediate local symptoms and, in some cases, a delayed reaction occurs in the site of injury, weeks to months later. In this case, persistent, firm, flesh-colored papules or nodules develop. MATERIAL AND METHODS: Twenty-four biopsies from 21 patients with the diagnosis of sea urchin granuloma were studied, as well the clinical data. Specimens were routinely processed and stained with hematoxylin-eosin and leucocyte common antigen, CD20, CD3, CD4, CD8, CD30, CD68, kappa and lambda. RESULTS: Patients presented with persistent, single or multiple, nodules or papules, usually located in the hands. They developed from 2 weeks to over 1 year after the injury. Histopathologically, granulomas were present in all but one case. Sarcoidal granulomas were more common than suppurative or necrobiotic granulomas. Immunohistochemistry showed a polymorphous lymphoid inflammatory infiltrate, with T leucocytes predominating in most cases. CONCLUSION: Histopathological examination of sea urchin granulomas shows a non-specific granulomatous inflammation, in most cases of sarcoidal type. Being aware of the triggering event is necessary for the correct diagnosis.
Asunto(s)
Antígenos CD/metabolismo , Granuloma , Paracentrotus , Enfermedades de la Piel , Piel , Adulto , Anciano , Animales , Femenino , Granuloma/etiología , Granuloma/metabolismo , Granuloma/patología , Humanos , Masculino , Persona de Mediana Edad , Piel/lesiones , Piel/metabolismo , Piel/patología , Enfermedades de la Piel/etiología , Enfermedades de la Piel/metabolismo , Enfermedades de la Piel/patologíaRESUMEN
BACKGROUND: Angiomyolipomas (AML) represent less than 10% of renal tumours. They are most often detected incidentally during imaging tests, but there are several histological variants that pose difficulties in the radiological differential diagnosis. Their identification should allow the loss of renal parenchyma due to embolization or radical surgery to be prevented. METHODS: Retrospective study of patients undergoing kidney surgery with post-surgical pathological diagnosis of AML at the Álvaro Cunqueiro Hospital (2016-2021). Patients with a radiological diagnosis of AML who underwent surgery based on clinical criteria were excluded. RESULTS: 18 patients were registered, allowing for the assessment of 18 renal tumours. All of the cases were diagnosed incidentally. Preoperative radiological diagnosis was: 9 lesions suggestive of renal cell carcinoma (RCC) (50%), 7 cases suggestive of RCC vs. AML (38.9%) and 2 lesions suggestive of AML vs. retroperitoneal liposarcoma (11.1%). Histological variants of AML were found in 61.1% of cases (n = 11). The most widely used surgical technique was partial nephrectomy, in 66.67% of cases. CONCLUSIONS: The radiological differential diagnosis of AML, and particularly its variants, with malignant lesions have important limitations either due to the predominance or scarcity of any of the AML components. Some cases can also pose difficulties at the histological level. This fact highlights the importance of the specialization of uroradiologists and uropathologists and the performance of kidney-sparing therapeutic techniques.
Asunto(s)
Angiomiolipoma , Carcinoma de Células Renales , Neoplasias Renales , Leucemia Mieloide Aguda , Humanos , Neoplasias Renales/diagnóstico , Neoplasias Renales/cirugía , Carcinoma de Células Renales/cirugía , Angiomiolipoma/diagnóstico , Angiomiolipoma/terapia , Estudios Retrospectivos , Nefrectomía/métodos , Leucemia Mieloide Aguda/diagnóstico , Leucemia Mieloide Aguda/cirugía , Diagnóstico DiferencialRESUMEN
Nephrogenic adenoma (NA) is an infrequent reactive urothelial lesion. The expression of immunohistochemical renal tubular markers has been reported in NA, although a proximal or distal nephron phenotype has not been established. Special AT-rich sequence-binding protein 2 (SATB2) is a marker of a colorectal origin of adenocarcinomas, occasionally reported in renal samples. We have analyzed SATB2 expression in NA, with correlation with other tubular markers, as well as in the normal kidney. Fifty cases of NA were immunostained with PAX8, SATB2, proximal nephron markers [CD10, renal cell carcinoma (RCC) marker, alpha-methylacyl-CoA racemase (AMACR), and CD15], and distal markers (Ksp cadherin, cytokeratin 7, E-cadherin (E-cad), and cytokeratin 19). Ten normal kidney sections were stained with a double method combining SATB2 plus CD10, RCC marker, AMACR, Ksp cadherin, cytokeratin 7, or E-cad. All NA were immunoreactive for PAX8 and 57% for SATB2. Every case was positive for proximal and distal nephron markers: 100% for cytokeratins 7 and 19, 84.1% E-cad +, 81.6% AMACR +, 68.9% Ksp cadherin +, 63% CD15 +, 53.3% CD10 +, and 28.6 % RCC +. In the normal kidney, SATB2 was detected in the straight part of the proximal tubules and the thin descending loops of Henle. NA shows a multiphenotypic pattern with coexpression of both proximal and distal nephron markers, and constant expression of PAX8, cytokeratins 7 and 19. SATB2 is often positive in NA, which should be kept in mind to avoid a possible misdiagnosis of intestinal adenocarcinoma. SATB2 is a marker of the normal proximal nephron.
Asunto(s)
Adenoma , Carcinoma de Células Renales , Neoplasias Renales , Proteínas de Unión a la Región de Fijación a la Matriz , Humanos , Carcinoma de Células Renales/metabolismo , Queratina-7 , Biomarcadores de Tumor/metabolismo , Inmunohistoquímica , Nefronas/metabolismo , Nefronas/patología , Neoplasias Renales/metabolismo , Adenoma/metabolismo , Cadherinas/metabolismo , Factores de TranscripciónRESUMEN
Elastolytic giant cell granuloma (EGCG) is an infrequent granulomatous skin disorder with variable response to different therapeutic regimens. Information on the benefit of phototherapy is very scarce as this therapy has seldom been tried in the affected patients. We present the results achieved in two female patients after undergoing psoralen-ultraviolet A (PUVA). Two 54-year-old otherwise healthy female patients received a course of PUVA after trying other alternatives. Complete clearance was achieved in the two patients with excellent tolerance and no adverse effects. We consider PUVA is a well-tolerated, safe, and effective treatment for patients with EGCG.
Asunto(s)
Granuloma de Células Gigantes/tratamiento farmacológico , Terapia PUVA , Enfermedades de la Piel/tratamiento farmacológico , Femenino , Granuloma de Células Gigantes/patología , Humanos , Persona de Mediana Edad , Enfermedades de la Piel/patologíaRESUMEN
Smooth muscle hamartoma (SMH) is a cutaneous malformation mainly composed of a disorganized proliferation of normal muscle fibers that arise from arrector pili. It usually presents as a single congenital lesion that frequently involves the back and the lower limbs. Unusual clinical presentations, such as atypical localizations, multiple disseminated lesions, and generalized forms have been rarely described. In 2001, Gualandri et al. reported the presence of multiple SMH in three members of the same family, namely two brothers and their mother. This is, as far as we know, the only familial case reported in the English literature. We herein describe a similar case affecting two siblings who presented with identical congenital lesions in the same location.
Asunto(s)
Hamartoma/congénito , Hamartoma/patología , Neoplasias Primarias Múltiples/congénito , Neoplasias Primarias Múltiples/patología , Neoplasias Cutáneas/congénito , Neoplasias Cutáneas/patología , Biopsia , Nalgas , Niño , Femenino , Hamartoma/genética , Humanos , Región Lumbosacra , Masculino , Músculo Liso/patología , Neoplasias Primarias Múltiples/genética , Hermanos , Neoplasias Cutáneas/genética , MusloRESUMEN
OBJECTIVES: Intraductal carcinoma of the prostate (IDC-P) is usually associated with high grade, aggresive acinar adenocarcinomas. IDC-P is supposed to result from the spread of the adenocarcinoma along the prostatic ducts. IDC-P rarely occurs without invasive carcinoma or with a coexistent low grade adenocarcinoma. MATERIAL AND METHODS: We report two patients, 66 and 75 year-old, who presented IDC-P and low-grade acinar adenocarcinoma foci in their radical prostatectomy surgical specimens. RESULTS: Acinar adenocarcinomas were grade group 1, PTEN+, pT2. In the first case, the invasive adenocarcinoma was adjacent but nor intermingled with the IDC-P, and a discordance in the immunophenotype between them was outstanding (positivity for ERG in the acinar carcinoma being negative in the IDC-P). In the second case, the foci of adenocarcinoma were distant from the IDC-P. The first patient had not biochemical recurrence after a 34 month follow-up period. CONCLUSIONS: This kind of cases supports the existence of an infrequent subtype of IDC-P that could be considered as an in situ neoplasia.
Asunto(s)
Adenocarcinoma , Carcinoma Intraductal no Infiltrante , Neoplasia Intraepitelial Prostática , Neoplasias de la Próstata , Masculino , Humanos , Anciano , Próstata/patología , Neoplasia Intraepitelial Prostática/genética , Neoplasia Intraepitelial Prostática/patología , Neoplasia Intraepitelial Prostática/cirugía , Carcinoma Intraductal no Infiltrante/genética , Carcinoma Intraductal no Infiltrante/patología , Carcinoma Intraductal no Infiltrante/cirugía , Prostatectomía , Clasificación del Tumor , Neoplasias de la Próstata/patología , Adenocarcinoma/cirugíaRESUMEN
IgG4 related disease is a term used to describe a fibroinflammatory condition characterized by storiform fibrosis, inflammation with a dense lymphoplasmocytic infiltrate rich in plasma cells expressing IgG4, and often, if not always, raised serum levels of IgG4. We report a case of a patient with a past history of retroperitoneal fibrosis presenting with a swollen left testicle, who underwent an orchidectomy due to suspicion of malignancy. The surgical specimen revealed a paratesticular pseudotumor with histopathological and immunohistochemical characteristics of IgG4 related disease. To the best of our knowledge, just nine such cases have previously been reported, of which only three were manifestations of systemic disease, as in the present case. Whilst it is important to recognize the clinical and radiological features of this entity, histopathology is often essential in order to confirm the diagnosis.
Asunto(s)
Enfermedad Relacionada con Inmunoglobulina G4 , Neoplasias , Fibrosis Retroperitoneal , Humanos , Inmunoglobulina G , Enfermedad Relacionada con Inmunoglobulina G4/complicaciones , Enfermedad Relacionada con Inmunoglobulina G4/diagnóstico , Enfermedad Relacionada con Inmunoglobulina G4/patología , Neoplasias/patología , Células Plasmáticas/patología , Fibrosis Retroperitoneal/complicaciones , Fibrosis Retroperitoneal/diagnóstico , Fibrosis Retroperitoneal/patologíaRESUMEN
Clear cytoplasm is a major characteristic feature of most malignant renal neoplasms. Benign clear cells in the renal parenchyma, usually histiocytes, can occasionally be found, but they are infrequently of an epithelial nature. We report histological, immunohistochemical, ultrastructural, and cytogenomic features of clear epithelial cell clusters incidentally found in four kidney specimens. Multiple microscopic clear cell clusters were present in the cortex, often in subcapsular location. They were composed of large epithelial cells with strikingly clear cytoplasm, without nuclear atypia, arranged in solid nests, and some tubules with narrow lumina. Immunohistochemically, they were positive for AE1AE3, PAX 8, EMA, kidney-specific cadherin, cytokeratin 7, E cadherin, and CD117, with focal immunoreactivity for CD10. Carbonic anhydrase IX, vimentin, and markers related to apoptosis and proliferation were negative. Ultrastructurally, the cytoplasms were enlarged and poor in organelles, showing ballooning degeneration. Array comparative genomic hybridization showed no chromosomal gains or losses. Clear cell clusters constitute a rare finding in the kidney and must be differentiated from benign lesions (ectopic adrenal tissue, osmotic tubulopathy, histiocytic clusters, renal adenomas) and renal cell carcinomas. Clear cell clusters appear to be generated from "endocrine-type" atrophic tubules whose cells are enlarged due to intracellular oedema. Immunohistochemistry shows a distal nephron phenotype with a limited expression of a proximal marker, CD10. Coexisting chronic renal disease or ischemic conditions seem to be related to the development of clear cell clusters. Pathological, ultrastructural, and cytogenomic features do not support a preneoplastic nature of this lesion, at least in the cases studied here.
Asunto(s)
Carcinoma de Células Renales/patología , Neoplasias Renales/patología , Riñón/patología , Anciano , Anciano de 80 o más Años , Biomarcadores/análisis , Carcinoma de Células Renales/química , Carcinoma de Células Renales/ultraestructura , Hibridación Genómica Comparativa , Diagnóstico Diferencial , Errores Diagnósticos , Femenino , Humanos , Inmunohistoquímica , Riñón/química , Riñón/ultraestructura , Neoplasias Renales/química , Neoplasias Renales/ultraestructura , Masculino , Microscopía Electrónica , Persona de Mediana Edad , Fenotipo , Valor Predictivo de las PruebasRESUMEN
OBJECTIVES: The pathological examination of vasectomy specimens to confirm the presence of vas deferens is usually simple and is done by routine hematoxylinand eosin staining. Use of immunohistochemical techniques can aid to the diagnosis in those cases with artifacts of the epithelium, and they are also useful to differentiate vas deferens from blood vessel. We have investigated the usefulness of CD31, CD34, ERG and PAX8 for these purposes. MATERIAL AND METHODS: 81 sections from vasectomy specimens in which any section showed some kind of epithelial artifact were analyzed. Immunohistochemistry was performed with monoclonal antibodies for CD31 (clone JC70), CD34 (clone QBEnd/10), ERG (clone EPR3864) and PAX8 (clone MRQ-50). Evaluation of the vas deferens and vascular endothelial staining was done. RESULTS: Histologically, vas deferens epithelium was well-preserved in 18 sections (22.2%), denuded in 6 (7.4%), crushed or distorted in 48 sections (59.3%), detached in 5 (6,2%), and misplaced out of the vas deferens lumen in 4 (4.9%). In most of the sections the epithelium showed weak (86.4%) or moderate (9.9%) CD31 cytoplasmic staining, as well as strong nuclear PAX8 reactivity in all of the sections, exhibiting a granular pattern in the detached or artifacted epithelium. CD34 and ERG were negative in the epithelium. Capillary vessel endothelium in the vas deferens wall showed strong cytoplasmic positivity for CD31 and CD34, as well as nuclear ERG reactivity, being PAX8 negative. CONCLUSIONS: PAX8 is a useful antibody to confirm the presence of vas deferens in artifacted vasectomy specimens. CD34 and ERG are negative in the epithelium,and, otherwise, they are expressed by vascular endothelium, with the advantage of nuclear staining pattern for ERG. CD31, a classic endothelial marker, is not so specific as it had been stated as it shows weak or moderate expression in the vas deferens epithelium.
OBJETIVOS: El estudio anatomopatológico de las muestras de vasectomía para confirmar la presencia de conducto deferente generalmente es sencillo se realiza con tinción rutinaria de hematoxilina-eosina. En aquellos casos con artefacto del epitelio, el uso de técnicas de inmunohistoquímica puede ayudar al diagnóstico y sirve, además para diferenciar deferente de vaso sanguíneo. Hemos investigado la utilidad de CD31, CD34, ERG y PAX8 para estos fines.MATERIAL Y MÉTODOS: Se han estudiado 81 secciones de muestras de vasectomía en las que alguna sección presentaba algún tipo de artefacto en el epitelio. Se realizó inmunohistoquímica con anticuerpos monoclonales para CD31 (clon JC70), CD34 (clon QBEnd/10), ERG (clon EPR3864) y PAX8 (clon MRQ-50) evaluando la tinción en el epitelio deferencial y en el endotelio vascular. RESULTADOS: Histológicamente, el epitelio del conducto deferente aparecía conservado en 18 secciones (22,2%), denudado en 6 (7,4%), con artefacto de compresión o distorsión en 48 secciones (59,3%), desprendidoen 5 (6,2%) y desplazado fuera de la luz del conducto en 4 (4,9%). En la mayoría de las secciones el epitelio del CD presentó positividad citoplasmática para CD31, que fue débil (86,4%) o moderada (9,9%),y expresó intensamente PAX8 en los núcleos, con tinción granular en el epitelio denudado o artefactado. Fueron negativos CD34 y ERG. El endotelio capilar de los vasos de la pared del conducto deferente mostró intensa positividad citoplasmática para CD31 y CD34, y nuclear para ERG, siendo PAX8 negativo. CONCLUSIONES: PAX8 es un anticuerpo útil para confirmar la presencia de conducto deferente en muestras de vasectomía con artefacto. Son negativos CD34 yERG, que, por el contrario, marcan endotelio vascular, presentando ERG la ventaja de que la tinción es nuclear.CD31, marcador endotelial clásico, no es tan específicocomo se había propuesto puesto que presenta expresión débil en el epitelio del deferente.
Asunto(s)
Conducto Deferente , Vasectomía , Biomarcadores , Humanos , Inmunohistoquímica , Masculino , Coloración y EtiquetadoRESUMEN
INTRODUCTION AND OBJECTIVES: Urologists often submit the resected tissue from vasectomies for histopathological examination in order to confirm the presence of the vas deferens. Microscopy is simple and based on haematoxylin-eosin staining; however, sample artefacts can sometimes cause confusion and immunohistochemistry can be used to identify the vas deferens. MATERIALS AND METHODS: We investigated the utility of immunohistochemical analysis using E-cadherin and GATA-3 to confirm the presence of vas deferens epithelium in 110 vasectomy sections with different artefacts, using monoclonal antibodies and a multimer conjugated with peroxidase based technique; 5 renal arteries and 5 renal veins were stained as negative controls. RESULTS: Membrane staining was observed for E-cadherin, which was moderate (2.7%) or strong (97.3%) in the vas deferens epithelium in all cases: 35 without artefacts, 7 with denuded epithelium, 56 with compressed/distorted epithelium, 8 with detached epithelium and 4 with displaced epithelium. GATA-3 showed moderate (31%) or strong (69%) nuclear staining in all cases, including the 76 with artefacts. In the control group, arteries and veins were negative for both markers in the endothelium, but GATA-3 occasionally stained lymphocytes in the blood vessel wall. CONCLUSIONS: E-cadherin membrane positivity and GATA-3 nuclear expression are useful for the identification of the vas deferens in vasectomy samples containing artefacts. Vascular endothelium is negative for both markers and any possible GATA-3 staining of the lymphocytes in the blood vessel wall should not be misinterpreted.
Asunto(s)
Cadherinas , Factor de Transcripción GATA3 , Conducto Deferente , Vasectomía , Arterias , Biomarcadores , Cadherinas/metabolismo , Epitelio , Factor de Transcripción GATA3/metabolismo , Humanos , Inmunohistoquímica , Linfocitos , Masculino , Conducto Deferente/metabolismo , Vasectomía/métodosRESUMEN
OBJECTIVES: Tissue array (TA) technologyis widely used as a method for the in situ investigation oftissue markers in cancer studies. A limitation of this techniqueis the high price of tissue arrayers. We describetwo easy and non-expensive manual methods, that haveproduced small and medium format arrays. MATERIAL AND METHODS: 16 TAs were manuallyconstructed from conventional paraffin blocks using twodifferent techniques. For the first method, a 16G Tru-Cutneedle whose bevel edge had been cut, was used tomake the holes in the donor blocks (80 cases) and thereceptor ones (resulting in 2 TAs each one with 55 casesand two with 25 cases). In the second technique, a 4mm-diameter punch for cutaneous biopsies was appliedto the donor blocks (obtaining 210 cylinders from 108blocks) and to the receptor ones (12 TAs). Hematoxylin-eosin, immunohistochemical and in situ hybridizationstains were performed on sections from these TAs. RESULTS: The tissue loss rate in the sections obtainedfrom the TAs constructed with the first method was26.5%, but as two cylinders were included from eachcase, at least one of them was retained. There was notany loss of tissue in the sections from the TAs constructedwith the second method. The results of all of the stainsperformed were successful. CONCLUSIONS: These two manual methods of elaborationof TAs result rather simple and they are economical.The tissue loss rate is significant in the first methodbut it can be compensated embedding more than onecylinder from each donor block. There was not anyproblem in the sectioning of the TAs constructed with thesecond method.
OBJETIVOS: La tecnología de matricestisulares (MTs) se ha implantado como método de trabajohabitual en la investigación de marcadores tisularesrelacionados con el cáncer. Su inconveniente esla necesidad de contar con un dispositivo especial deprecio elevado. Presentamos dos métodos manuales,económicos, que han sido válidos para construir MTsde pequeño y mediano formato.MATERIAL Y MÉTODOS: Se han elaborado 16 MTs deforma manual a partir de bloques convencionales deparafina, mediante dos técnicas diferentes. En la primerase utilizó una aguja Tru-Cut 16G a la que se cortó el bisel, para realizar los orificios en los bloques donantes(80 casos) y en los receptores (resultando dos MTs de55 casos y dos de 25 casos). Para la segunda técnicase utilizó un dispositivo "punch" para biopsias cutáneas,de 4 mm de diámetro, que se aplicó a los bloques donantes(obteniendo 210 cilindros de 108 bloques) y alos receptores (12 MTs). En las secciones de las MTs obtenidasse realizaron tinciones de hematoxilina-eosina,inmunohistoquímica (IHQ) e hibridación in situ. RESULTADOS: La tasa de pérdida de material en las seccionesobtenidas con el primer método fue del 26,5%,pero al haberse incluído dos cilindros de cada caso, almenos uno de ellos se conservó. En las MTs obtenidascon el método de punch biopsia no hubo pérdidas detejido. Los resultados de todas las tinciones realizadasfueron óptimos. CONCLUSIONES: Estos dos métodos manuales de elaboraciónde MTs resultan relativamente sencillos y soneconómicos. La tasa de pérdida de tejido es sólo significativaen el primero de los métodos pero se puedecompensar incluyendo varios cilindros de cada bloquedonante. En el segundo método no han existido problemasdestacables en la fase de microtomía.
Asunto(s)
Análisis de Matrices Tisulares , InmunohistoquímicaRESUMEN
We are reporting a case of neurobrucellosis that was clinically and radiologically indistinguishable from a cerebral tumor. The histological diagnosis was granulomatous encephalitis. The diagnosis was established by enzyme-linked immunosorbent assay (ELISA), detecting high levels of Ig G and Ig M Brucella antibodies in the serum and the cerebrospinal fluid. We suggest that patients with granulomatous encephalitis, without a clear etiological agent, should be studied for Brucella.
Asunto(s)
Neoplasias Encefálicas/diagnóstico , Encéfalo/microbiología , Brucelosis/microbiología , Adulto , Encéfalo/patología , Encéfalo/cirugía , Brucelosis/diagnóstico , Brucelosis/cirugía , Diagnóstico Diferencial , Femenino , Humanos , Imagen por Resonancia Magnética , Procedimientos Neuroquirúrgicos/métodos , Tomografía Computarizada por Rayos XRESUMEN
Background: Angiomyolipomas (AML) represent less than 10% of renal tumours. They are most often detected incidentally during imaging tests, but there are several histological variants that pose difficulties in the radiological differential diagnosis. Their identification should allow the loss of renal parenchyma due to embolization or radical surgery to be prevented. Methods: Retrospective study of patients undergoing kidney surgery with post-surgical pathological diagnosis of AML at the Álvaro Cunqueiro Hospital (20162021). Patients with a radiological diagnosis of AML who underwent surgery based on clinical criteria were excluded. Results: 18 patients were registered, allowing for the assessment of 18 renal tumours. All of the cases were diagnosed incidentally. Preoperative radiological diagnosis was: 9 lesions suggestive of renal cell carcinoma (RCC) (50%), 7 cases suggestive of RCC vs. AML (38.9%) and 2 lesions suggestive of AML vs. retroperitoneal liposarcoma (11.1%). Histological variants of AML were found in 61.1% of cases (n = 11). The most widely used surgical technique was partial nephrectomy, in 66.67% of cases. Conclusions: The radiological differential diagnosis of AML, and particularly its variants, with malignant lesions have important limitations either due to the predominance or scarcity of any of the AML components. Some cases can also pose difficulties at the histological level. This fact highlights the importance of the specialization of uroradiologists and uropathologists and the performance of kidney-sparing therapeutic techniques (AU)
Asunto(s)
Humanos , Masculino , Femenino , Adulto , Persona de Mediana Edad , Anciano , Angiomiolipoma/diagnóstico , Angiomiolipoma/cirugía , Neoplasias Renales/diagnóstico , Neoplasias Renales/cirugía , Estudios Retrospectivos , Nefrectomía , Hallazgos IncidentalesRESUMEN
Nephrogenic adenoma (NA) has been considered as a metaplastic process of the urothelium. It has been suggested that this lesion is of renal tubular cell origin or differentiation. Immunohistochemical studies of NA emphasize its staining with α-methylacyl-coenzyme A racemase (AMACR), and prostatic adenocarcinoma may be a possible differential diagnosis. This reactivity was recently discussed as an artifact due to endogenous biotin. Kidney-specific cadherin (Ksp-cad) is a marker of distal nephron. CD10 and KIT are also expressed in the kidney. We studied the immunohistochemical expression of AMACR, p63, Ksp-cad, CD10, and KIT in 9 cases of NA (forming a total of 12 lesions). Practically all of the lesions stained for AMACR with 2 different antibodies and 2 high-sensitivity (multimer or polymer based) biotin-free methods (83% and 100%). The staining was similar for both methods in 9 of these 12 lesions. All of the NAs were negative for p63 and KIT, except 1 case, with focal reactivity for KIT. CD10 was expressed very focally in 4 of the 12 lesions (33%). We observed weak staining for Ksp-cad in 6 lesions (50%) and 3 (25%) showed a moderate positivity in 15% to 50% of the cells. In conclusion, positivity of NA for AMACR is not an artifact, as we confirmed using 2 different methods. Besides, p63, a basal cell marker, is usually negative. Immunoreactivity for Ksp-cad seems to support the differentiation of NA to distal nephron cells, at least in some of the cases. Other markers expressed by the nephron, such as CD10 and KIT, are usually negative in NA.
Asunto(s)
Adenoma/diagnóstico , Neoplasias Renales/diagnóstico , Túbulos Renales Distales/patología , Urotelio/metabolismo , Adenoma/patología , Anciano , Anciano de 80 o más Años , Artefactos , Biotina/química , Cadherinas/metabolismo , Transformación Celular Neoplásica , Diagnóstico Diferencial , Femenino , Humanos , Inmunohistoquímica/métodos , Neoplasias Renales/patología , Masculino , Metaplasia , Persona de Mediana Edad , Neprilisina/metabolismo , Racemasas y Epimerasas/metabolismo , Sensibilidad y Especificidad , Factor de Células Madre/metabolismo , Factores de Transcripción/metabolismo , Proteínas Supresoras de Tumor/metabolismo , Urotelio/patologíaRESUMEN
Objectives: Intraductal carcinoma of the prostate (IDC-P) is usually associated with high grade, aggresive acinar adenocarcinomas. IDC-P is supposed to result from the spread of the adenocarcinoma along the prostatic ducts. IDC-P rarely occurs without invasive carcinoma or with a coexistent low grade adenocarcinoma. Material and Methods: We report two patients, 66 and 75 year-old, who presented IDC-P and low-grade acinar adenocarcinoma foci in their radical prostatectomy surgical specimens. Results: Acinar adenocarcinomas were grade group 1, PTEN+, pT2. In the first case, the invasive adenocarcinoma was adjacent but nor intermingled with the IDC-P, and a discordance in the immunophenotype between them was outstanding (positivity for ERG in the acinar carcinoma being negative in the IDC-P). In the second case, the foci of adenocarcinoma were distant from the IDC-P. The first patient had not biochemical recurrence after a 34 month follow-up period. Conclusions: This kind of cases supports the existence of an infrequent subtype of IDC-P that could be considered as an in situ neoplasia (AU)
Objetivos: El carcinoma intraductal de la próstata(CIDP) aparece generalmente asociado a adenocarcinomasacinares agresivos, de alto grado. En general se cree que elCIDP representa una forma de diseminación deladenocarcinoma a los ductos prostáticos. En ocasiones elCIDP aparece, sin embargo, sin tumor infiltrante o conadenocarcinomas de bajo grado.Material y Métodos: Presentamos dos pacientes de66 y 75 años, que en las piezas de prostatectomía radicalpresentaron CIDP y focos de adenocarcinoma acinar degrupo de grado bajo.Resultados: Los adenocarcinomas acinares eran degrupo de grado 1, PTEN+, pT2. En el primer caso, eladenocarcinoma se localizaba adyacente, pero noentremezclado, con el CIDP, y destacaba la discordanciaen el inmunofenotipo entre el adenocarcinoma, ERG+, y elCIDP, que era ERG-. En el segundo, los focos de adenocarcinoma se localizaban a distancia del CIDP. Elprimer paciente no ha presentado recidiva bioquímica tras34 meses de seguimiento.Conclusiones: Las características de los casos quepresentamos apoyan la existencia de un subtipoinfrecuente de CIDP que se podría considerar como unaneoplasia in situ. (AU)
Asunto(s)
Humanos , Masculino , Anciano , Adenocarcinoma/cirugía , Carcinoma Intraductal no Infiltrante/cirugía , Neoplasia Intraepitelial Prostática/cirugía , Neoplasias de la Próstata/cirugía , Carcinoma Intraductal no Infiltrante/patología , Clasificación del Tumor , Prostatectomía , Neoplasia Intraepitelial Prostática/patología , Neoplasias de la Próstata/patologíaRESUMEN
Most of inguinal masses in children correspond to inguinal indirect hernias, but other pathologic entities may be found. Dermoid cysts of the spermatic cord are very rare, with only 9 clear cases reported in the literature to date, all of them in adults. We present a case of dermoid cyst of the spermatic cord in a 2-year-old boy, the youngest patient reported so far. Dermoid cysts of the spermatic cord should be considered as part of the differential diagnosis of inguinal masses in children, especially in cases of long-standing, nontender, and irreducible inguinal mass.
Asunto(s)
Quiste Dermoide/diagnóstico , Quiste Dermoide/patología , Neoplasias de los Genitales Masculinos/diagnóstico , Neoplasias de los Genitales Masculinos/patología , Cordón Espermático/patología , Preescolar , Quiste Dermoide/cirugía , Diagnóstico Diferencial , Neoplasias de los Genitales Masculinos/cirugía , Hernia Inguinal/diagnóstico , Humanos , Masculino , Enfermedades Raras , Cordón Espermático/diagnóstico por imagen , Cordón Espermático/cirugía , UltrasonografíaRESUMEN
INTRODUCCIÓN Y OBJETIVOS: Con frecuencia los urólogos remiten el tejido resecado durante las vasectomías para estudio anatomopatológico con el fin de confirmar la presencia de conducto deferente. El estudio microscópico es sencillo y se suele hacer con hematoxilina-eosina. En ocasiones, se ve dificultado por artefactos de la muestra y la inmunohistoquímica puede ayudar a reconocer la presencia de deferente. MATERIALES Y MÉTODOS: Hemos investigado la utilidad de la determinación inmunohistoquímica de cadherina E y GATA-3 para confirmar epitelio del deferente en 110 secciones de vasectomías con diferentes artefactos, utilizando anticuerpos monoclonales y técnica de multímero conjugado con peroxidasa; 5 arterias y 5 venas renales fueron controles negativos. RESULTADOS: Con cadherina E se observó tinción de membrana moderada (2,7%) o intensa (97,3%) en el epitelio del deferente en todos los casos: 35 sin artefacto, 7 con epitelio denudado, 56 con epitelio comprimido o distorsionado, 8 con epitelio desprendido y 4 con epitelio desplazado. GATA-3 mostró positividad nuclear moderada (31%) o intensa (69%) en todos los casos, incluyendo los 76 con los artefactos señalados. Las arterias y venas fueron negativas para ambos marcadores en el endotelio, con positividad para GATA-3 en ocasionales linfocitos de la pared. CONCLUSIONES: La inmunohistoquímica puede ayudar a reconocer la presencia de epitelio del deferente en vasectomías artefactadas con positividad de membrana para cadherina E y expresión nuclear de GATA-3. El endotelio vascular, por el contrario, es negativo para ambos marcadores. No se debe malinterpretar como positividad la posible tinción para GATA-3 de linfocitos de la pared
INTRODUCTION AND OBJECTIVES: Urologists often submit the resected tissue from vasectomies for histopathological examination in order to confirm the presence of the vas deferens. Microscopy is simple and based on haematoxylin-eosin staining; however, sample artefacts can sometimes cause confusion and immunohistochemistry can be used to identify the vas deferens. MATERIALS AND METHODS: We investigated the utility of immunohistochemical analysis using E-cadherin and GATA-3 to confirm the presence of vas deferens epithelium in 110 vasectomy sections with different artefacts, using monoclonal antibodies and a multimer conjugated with peroxidase based technique; 5 renal arteries and 5 renal veins were stained as negative controls. RESULTS: Membrane staining was observed for E-cadherin, which was moderate (2.7%) or strong (97.3%) in the vas deferens epithelium in all cases: 35 without artefacts, 7 with denuded epithelium, 56 with compressed/distorted epithelium, 8 with detached epithelium and 4 with displaced epithelium. GATA-3 showed moderate (31%) or strong (69%) nuclear staining in all cases, including the 76 with artefacts. In the control group, arteries and veins were negative for both markers in the endothelium, but GATA-3 occasionally stained lymphocytes in the blood vessel wall. CONCLUSIONS: E-cadherin membrane positivity and GATA-3 nuclear expression are useful for the identification of the vas deferens in vasectomy samples containing artefacts. Vascular endothelium is negative for both markers and any possible GATA-3 staining of the lymphocytes in the blood vessel wall should not be misinterpreted