Is magnetic resonance imaging insufficient in diagnosing preoperatively renal angiomyolipoma? A case report.

A 33-year-old woman was admitted to our department with a palpable right flank mass of considerable size. Renal cell carcinoma was the diagnosis made by CT scan and MRI. When the tumor was excised, histology revealed an angiomyolipoma. The preoperative diagnostic error of MRI as well as CT scan is discussed.