Complications of renal angiomyolipomas: CT evaluation.

Complications from angiomyolipomas are rare but often severe depending on the size and content of the angiomyolipoma. In this study, we describe 10 cases from 63 patients with renal angiomyolipomas in whom computed tomography revealed the following complications: compression of pyelocalyceal system in three cases, intratumoral bleeding in two cases, rupture in four cases with subcapsular, perirenal, or pararenal hematoma and extensive intrarenal/parapelvic hematoma, cystic degeneration in one case.