The existence of bilateral renal angiomyolipoma (AML) is fairly infrequent, especially when not associated with such syndromes as tuberous sclerosis or linfangioleimiomatosis. Here we present the case of a 40-year-old woman who was accidentally diagnosed at week 33rd of gestation by an ultrasound, of bilateral renal AML and that could be treated with kidney sparing conservative treatment. We have also done a review of the literature focusing on its management and its relationship with pregnancy.

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Introducción y Objetivos: El análisis de la etiología, manifestaciones clínicas, métodos diagnósticos y tratamiento empleado en la hemorragia retroperitoneal espontánea (HRE), en nuestra serie de pacientes. Métodos: Presentamos 27 casos de HRE diagnosticados en nuestro hospital entre Enero de 1996 y Diciembre de 2005. Las técnicas de imagen empleadas fueron ecografía abdominal, TC abdomino-pélvica y resonancia magnética. Resultados: La causa más frecuente de sangrado fue la rotura de un angiomiolipoma renal en 7 pacientes. Entre las manifestaciones clínicas, el dolor lumbar o abdominal fue el síntoma predominante. La ecografía abdominal detectó el hematoma en el 81,8% de pacientes, aportando un diagnóstico etiológico en tan sólo el 40,9% de los casos. La TC abdomino-pélvica reveló la hemorragia retroperitoneal en todos casos, y además diagnosticó en el 92,6%, el origen del sangrado. El tratamiento fue cirugía de urgencia en 10 pacientes, mientras que en los 17 restantes se optó, inicialmente, por medidas terapéuticas conservadoras. Conclusiones: En nuestra experiencia, en los casos de HRE, la TC abdomino-pélvica es la prueba diagnóstica de elección y el manejo terapéutico de esta patología deberá individualizarse en función de la situación hemodinámica del paciente y la etiología del síndrome.

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Background/Aims: A correlation has been observed between DNA ploidy and other prognostic parameters such as tumor stage and grade. The present study evaluates tumor aneuploidization during renal adenocarcinoma expansion and growth. Methods: A total of 252 renal tumors were analyzed between 1969 and 2001. Evaluated variables were age, TNM, Fuhrman classification, histology, size and DNA. A tumor was homogeneous when all the samples were diploid or aneuploid, and a heterogeneous tumor was the coexistence of aneuploid and diploid samples, or all-aneuploid with different aneuploid clones. Results: A total of 224 tumors were included (coefficient of variation <8). The DNA study classified 129 (57.6%) as diploid and 95 (42.4%) as aneuploid. The percentage of aneuploid tumors increased significantly with the pathological stage. Both aneuploid patterns were also significantly more frequent in advanced pathological stages. Tumors with multiple aneuploid clones (n = 17) were significantly more frequent in tumors measuring `4 cm. Both aneuploid patterns showed no differences in survival (p = 0.83), indicating that the heterogeneous pattern probably represents an intermediate step between diploid and homogeneous aneuploid tumor status. Conclusions: The aneuploid pattern is more common in more advanced stages of the disease, with no clear correlation to primary tumor size. This suggests gradual aneuploidization with tumor expansion and growth.