Bone-forming Angiomyolipoma of the Kidney

Angiomyolipomas (AML) are the most common benign renal tumors, occurring sporadically or as a part of tuberous sclerosis syndrome. Even though there are several histological subtypes for renal AML with rare occurrences of calcification, gross ossification has not been identified so far. We present the case report of a sporadic renal AML with radiological, intra operative, pathological, and histological features suggestive of massive bone formation within the tumour.