TSC1 and kidney angiomyolipoma: Renal angiomyolipomas were identified by ultrasound in five cases (5/22; 23%), only one of which harbored a PV in TSC1. Case ET171 (harboring an LPV) was the only patient in our series that died during the study period; this occurred due to bronchopneumonia at 1 year 9 months of age.