Medullary Sponge Kidney in a Symptomatic Elderly Female: A Case Report

Medullary Sponge Kidney (MSK) disease is a rare renal malformation characterized by cystic dilatation of papillary collecting ducts. Intravenous urography (IVU) is considered the gold standard for diagnosis. Here we present a case of MSK in an elderly symptomatic female with distinctive sonographic features. A 55-year-old female suffering from acute bilateral loin pain attended a Nephrology consultation at INMAS. X-Ray KUB showed bilateral small renal calculi, USG KUB scan revealed echogenic medullary pyramids. Multiple, small, cystic lesions were observed bilaterally alongside bright echogenic structures. Based on USG impression- bilateral sponge kidney with parenchymal renal disease, renal cysts and nephrocalcinosis, intravenous urography depicted ectasia of distal collecting ducts filled with contrast material, which is a characteristic finding in this scenario.