A rare case of retroperitoneal malignant Triton tumor invading renal vein and small intestine.

Introduction: Malignant Triton tumor is a very rare malignant peripheral nerve sheath tumor with rhabdomyosarcomatous differentiation. Most of those tumors occur in patients with von Recklinghausen's disease or as a late complication of irradiation and commonly seen in the head, neck, extremities and trunk.

Case Report: We reported retroperitoneal malignant Triton tumor in a 57-year-old female patient.

Giant renal oncocytoma.

Background: Renal onkocytoma is a distinctive benign tumor derived from epithelial cells of the distal renal tubules. These tumors are often clinically asymptomatic, diagnosed accidentally and difficult to distinguish from renal cell carcinoma.

Case Report: We presented a giant renal onkocytoma in a man aged 64, without any signs or symptoms of the urogenital system disorder.