Sclerotherapy for a Simple Renal Cyst Causing Hydronephrosis: A Case Report

A simple renal cyst is defined as a benign, fluid-filled, nonneoplastic lesion. In most cases, the cysts remain asymptomatic and usually require no invasive treatment (1). Occasionally, however, some cysts may cause pain, hematuria, hypertension, or obstruction of the collecting system (2). We report an unusual case of a patient with hydronephrosis due to a simple renal cyst that was treated successfully with percutaneous sclerotherapy using ethanol.