large multicystic dysplastic kidney mimicking a large cystic renal neoplasm

Multicystic Dysplastic Kidney (MCDK) is one of the most common renal conditions seen in paediatric population. The natural history typically involves involution and many of the patients with unilateral disease may actually never become symptomatic. The initial evaluation is usually done on Ultrasonography (USG) while cross-sectional imaging and nuclear scan are reserved for diagnostic dilemmas. Management is conservative and surgery is done for selected patients with symptomatic cysts or suspicion of neoplasm. We present an interesting case of MCDK in a nine-month-old female hypertensive child presenting with a large abdominal mass increasing in size with imaging features similar to cystic neoplasm and managed with nephrectomy.