Spinal adrenocortical adenomas are exceptional, and its behavior could be related to other conditions such as BWS. Gross total resection can be curative but a tight follow-up is needed. Immunohistochemical studies that include inhibin-alpha, synaptophysin, and melan-A can be useful in differential diagnosis as ultrastructural study. The decision on how to treat these patients is difficult given the low number of cases.

Most of urothelial carcinomas (UC) have a pattern of histological growth of papillary or solid type; nevertheless, in some cases there are histological types that significantly differ from these habitual patterns In this paper we have selected those UC variants that by its diagnosis difficulty and therapeutical or prognosis implications have to be perfectly identified and known by pathologists and urologist. The variants that we have considered of greater clinical and pathological interest have been: tubular and/or nested UC, microcystic UC, micropapillary UC, lymphoepithelioma like UC, plasmacytoid UC and sarcomatoid UC. A revision of the literature has been made of each one of these patterns evaluating the criteria diagnoses, clinical behavior and the present therapeutic options. In addition, we suggest that these UC variants must be explicitly reflected in the pathology report, due to its clinical implications.

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RESUMEN VARIANTES HISTOLÓGICAS DEL CARCINOMA UROTELIAL CON IMPLICACIONES DIAGNÓSTICAS,PRONÓSTICAS Y TERAPÉUTICAS La mayoría de los carcinomas uroteliales (CU) tienen un patrón de crecimiento histológico de tipo papilar o de tipo sólido; sin embargo, en algunos casos existen variedades histológicas que difieren significativamente de estos patrones habituales En este artículo se han seleccionado aquellas variantes de CU que por su dificultad diagnóstica e implicaciones pronósticas o terapéuticas tienen que ser perfectamente identificadas y conocidas por los patólogos y los urólogos. Las variantes que hemos considerado de mayor interés tanto clínico como patológico han sido: CU variedad en nidos y/o tubular, CU variedad microquística, CU variedad micropapilar, CU con intenso estroma linfoide, tipo linfoepitelioma, CU variedad plasmocitoide y CU sarcomatoide. De cada uno de estos patrones se ha realizado una revisión de la literatura valorando los criterios diagnósticos, el comportamiento clínico y las posibilidades terapéuticas actuales. Además, sugerimos que estas variedades de CU deben ser reflejadas explícitamente en el informe del diagnóstico anatomopatológico, debido a sus implicaciones clí-nicas.Palabras clave: Carcinoma de vejiga. Carcinoma urotelial. Tumores vesicales. ABSTRACT HISTOLOGICAL VARIANTS OF UROTHELIAL CARCINOMA WITH DIAGNOSTIC, PROGNOSTIC ANDTHERAPEUTICAL IMPLICATIONS Most of urothelial carcinomas (UC) have a pattern of histological growth of papillary or solid type; nevertheless, in some cases there are histological types that significantly differ from these habitual patterns In this paper we have selected those UC variants that by its diagnosis difficulty and therapeutical or prognosis implications have to be perfectly identified and known by pathologists and urologist. The variants that we have considered of greater clinical and pathological interest have been: tubular and/or nested UC, microcystic UC, micropapillary UC, lymphoepithelioma like UC, plasmacytoid UC and sarcomatoid UC. A revision of the literature has been made of each one of these patterns evaluating the criteria diagnoses, clinical behavior and the present therapeutic options. In addition, we suggest that these UC variants must be explicitly reflected in the pathology report, due to its clinical implications. ORIGINAL 990Picazo MªL et al./Actas Urol Esp. 2007;31(9):989-1001 A proximadamente el 95% de los tumores de la vejiga son tumores epiteliales, la mayoría carcinomas transicionales con patrón papilar o sólido que no plantean problemas diagnósticos para el patólogo. Además, es ampliamente conocido, que en los carcinomas transicionales de alto grado, hay áreas focales de diferenciación escamosa o glandular 1 , lo que ha llevado a algunos autores a utilizar el término de carcinoma urotelial (CU) con "diferenciación epitelial mixta" para describir aquellos casos en los hay áreas extensas con dos o más patrones histológicos 2 .La mejor especialización en uropatología, unida a una mayor experiencia, ha permitido reconocer en...