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1.
Rev. esp. patol ; 53(4): 218-225, oct.-dic. 2020. ilus, tab
Artigo em Espanhol | IBECS | ID: ibc-200567

RESUMO

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


Assuntos
Humanos , Masculino , Caderinas/isolamento & purificação , Fator de Transcrição GATA3/isolamento & purificação , Vasectomia/classificação , Ducto Deferente/citologia , Imuno-Histoquímica/métodos , Anticorpos Monoclonais , Endotélio Vascular/patologia
2.
Rev Esp Patol ; 53(4): 218-225, 2020.
Artigo em Espanhol | MEDLINE | ID: mdl-33012491

RESUMO

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.


Assuntos
Caderinas , Fator de Transcrição GATA3 , Ducto Deferente , Vasectomia , Artérias , Biomarcadores , Caderinas/metabolismo , Epitélio , Fator de Transcrição GATA3/metabolismo , Humanos , Imuno-Histoquímica , Linfócitos , Masculino , Ducto Deferente/metabolismo , Vasectomia/métodos
3.
Arch. esp. urol. (Ed. impr.) ; 73(6): 534-540, jul.-ago. 2020. ilus
Artigo em Espanhol | IBECS | ID: ibc-195928

RESUMO

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 específico como se había propuesto puesto que presenta expresión débil en el epitelio del deferente


OBJECTIVES: The pathological examination of vasectomy specimens to confirm the presence of vas deferens is usually simple and is done by routine hematoxylin and 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


Assuntos
Humanos , Masculino , Ducto Deferente/química , Vasectomia/métodos , Molécula-1 de Adesão Celular Endotelial a Plaquetas/análise , Antígenos CD34/análise , Anticorpos Biespecíficos/análise , Fator de Transcrição PAX8/análise , Ducto Deferente/cirurgia , Imuno-Histoquímica , Biomarcadores/análise , Sensibilidade e Especificidade , Valores de Referência , Reprodutibilidade dos Testes
4.
Arch Esp Urol ; 73(6): 534-540, 2020 07.
Artigo em Espanhol | MEDLINE | ID: mdl-32633248

RESUMO

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.


Assuntos
Ducto Deferente , Vasectomia , Biomarcadores , Humanos , Imuno-Histoquímica , Masculino , Coloração e Rotulagem
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