Emergency embolization of a bleeding renal angiomyolipoma using polyvinyl alcohol particles.

A ngiomyolipomas (AMLs) are hamartomatous lesions of which 80% are sporadic and 20% are associated with tuberous sclerosis complex (TSC). AMLs are encountered in 60%–80% of patients with TSC. Bilateral AMLs commonly point to the diagnosis of TSC (1). Dysmorphic vessels in AMLs can have microaneurysms or macroaneurysms, which may rupture and bleed, resulting in significant morbidity. Hence, monitoring the growth of AMLs is essential and prophylactic embolization is recommended.