Collecting duct carcinoma of the kidney. A contribution of 4 new cases.

Objective: Collecting duct carcinoma of the kidney is a rare and aggressive subtype of renal cell carcinoma with low cancer-specific survival. We reviewed our series of collecting duct tumours retrospectively.

Methods/results: We performed a retrospective analysis of the collecting duct carcinomas of the kidney treated in our unit between January 2007 and December 2012.