Cystic nephroma: A multicystic renal neoplasm

A 42-year-old female presented with a complaint of abdominal pain for 3 months. Deep palpation revealed tenderness in the left lumbar region. Ultrasonography and contrast-enhanced computed tomography revealed a multiloculated cyst in the left kidney. The results of guided fine needle aspiration cytology were inconclusive. On exploration, the renal lump was found to be a smooth, well-circumscribed swelling protruding from the anterior surface of the left kidney, with no extrarenal infiltration. Left nephrectomy was performed. The cut surface of the resected specimen showed a well-circumscribed tumor containing large cystic spaces within the renal tissue. Histopathological examination revealed cystic nephroma, which is a rare neoplasm of the kidney. The postoperative course was uneventful. The patient was discharged on the 5th postoperative day. Now, at 1-year follow-up, the patient is well without any signs of recurrence on imaging.