Adult biphasic renal tumors

摘要

We have read, with interest, the article by Dr Mudaliar and colleagues.The authors reported a highly unusual and fascinating mixed epithelial and stromal tumor of the kidney (MESTK) with papillary renal cell carcinoma (type 1) arising in one of the cysts. Apparently, the papillary component was an integral part of the main tumorous mass.We have come across a similar case, composed of typical MESTK in a 55-year-old Caucasian male. His past medical history was unremarkable, without any hormonal or antihormonal therapy. No other tumors were disclosed by computed tomography scan. The tumor was located in the left kidney. The largest diameter was 45 mm, and the stage was pT1b according TMN 2009. The tumor was composed of a solid Mullerian stromal component and variable cystic structures (Figures 1 and 2).