Retroperitoneal hemorrhage from kidney angiomyolipoma.
Mentions: An 86-year-old woman with end-stage renal disease (etiology unknown) presented with left flank pain for ten hours. She was hypotensive and had a firm, exquisitely tender left flank mass. Computed tomography (CT) scan of the abdomen revealed a 20 cm left renal mass with extensive fatty tissue and associated retroperitoneal hemorrhage (Fig. 1). The patient died from hemorrhagic shock. Based on the large peri-renal fatty masses and the presence of a vessel extending into the renal parenchyma (Fig. 2), we concluded this was a kidney angiomyolipoma.1Figure 1