[Symptomatic leiomyoma of the kidney: renal mass with difficult preoperative diagnosis]. / Leiomioma renal sintomático: una masa renal de difícil diagnóstico.

Renal leiomyoma is a benign mesenchymal tumour that, albeit very rare, has to be ruled out when a renal mass has been diagnosed. This tumour can arise from any organ of the genitourinary tract with smooth muscle cells, being the renal capsule the most frequent origin. As its behaviour is not aggressive, nephron-sparing surgery is indicated. However, as it is difficult to preoperatively differentiate the leiomyoma from the adenocarcinoma, the former is commonly diagnosed after examination of the entire organ surgically removed.

Leiomioma renal sintomático: una masa renal de difícil diagnóstico / Symptomatic leiomyoma of the kidney: renal mass with difficult preoperative diagnosis

El leiomioma renal es un tumor mesenquimatoso benigno poco frecuente que, no obstante, se debe tener en cuenta ante el diagnóstico de una masa renal. Esta neoplasia puede originarse en cualquier órgano del aparato genitourinario que contenga músculo liso, siendo la cápsula renal la localización más frecuente. Dado el comportamiento benigno de la lesión, es subsidiario de la realización de una cirugía renal conservadora. No obstante, ante la dificultad para distinguirlo del adenocarcinoma, no será infrecuente que el diagnóstico se produzca tras el análisis histológico de una pieza de nefrectomía radical (AU)