Aggressive co-existence: Collecting duct and clear cell carcinoma in the same kidney

Özet

As in every organ, synchronous multiple cancers are rarely encountered in kidneys. In the literature, mostlyco-existence of renal cell carcinoma and transitional cell carcinoma was reported. In the literature, the coexistence of collecting duct carcinoma and clear cell carcinoma was described only for a few cases withdifferent patterns. With these two cases, we aimed to present a very rare entity with synchronous existenceof clear cell renal cell carcinoma and collecting duct carcinoma in the same kidneys.