Pheochromocytoma presenting as rhabdomyolysis and acute myoglobinuric renal failure. We report the case of a previously healthy young woman who presented with the sudden onset of rhabdomyolysis and myoglobinuric renal failure, requiring hemodialysis for 3 weeks. Common causes of rhabdomyolysis were ruled out; as renal function returned, severe hypertension was noted and a pheochromocytoma was diagnosed. We suggest that pheochromocytoma causes rhabdomyolysis and myoglobinuria via catecholamine-mediated vasoconstriction and skeletal muscle ischemia. 