Concurrent renomedullary interstitial cell tumor and angiomyolipoma: A case report

Renomedullary interstitial cell tumor (RMICT) is a commonly incidentally found benign tumor at autopsy. However, RMICT is rarely recognized in routine surgical pathological specimens. Renal angiomyolipoma (AML) is also an uncommon entity of renal parenchymal tumor. To the best of our knowledge, there were only three reported cases with synchronous RMICT and AML in the English literatures. Herein, we described a patient with concurrent RMICT and AML in the same kidney. This is a 36-year-old asymptomatic woman presented to our hospital due to incidentally found right renal tumor by routine health checkup. During the surgery for the main renal tumor, a tiny RMICT (0.4 cm in diameter) was also identified by the surgeon.