[Sarcomatoid renal carcinoma. Report of 2 cases]. / Carcinoma renal sarcomatoide. Presentación de dos casos.

OBJECTIVE: To describe two cases of sarcomatoid renal carcinoma, one of them is alive after five years from surgery. METHODS: Both patients had undergone radical nephrectomy, without complementary treatment. RESULTS: One patient is alive after five years; the second patient presented acute renal failure and died after five days from surgery. CONCLUSIONS: Sarcomatoid renal carcinoma is a uncommon variety of renal cell carcinoma, with highly malignant behavior. The median survival is six months, but exceptional cases with larger survival (five years) have been reported in the literature.