Haemangiopericytoma of kidney.

Haemangiopericytoma (HPC) is an uncommon mesenchymal neoplasm of kidney. It affects young males unlike other common renal tumors and presents with a painless renal mass occasionally associated with haematuria. A 41 year old male presented with a left side 15x15 cm abdominal mass in his left lumbar and hypochondrium region. Contrast enhanced computed tomography showed a heterogenous mass with calcification, fluid filled cystic areas and showing a mild enhancement peripherally. Patient underwent left radical nephrectomy. The tumor was well circumscribed with solid and cystic areas had caused a superior polar hydronephrosis. The histological, histochemical and immuhistochemical findings suggested the diagnosis of HPC. Patient recovered well and is asymptomatic one year after surgery.