Granulocytic sarcoma of the kidney in a patient with acute myelomonocytic leukaemia. A case report.

A 26-year-old man with acute myelomonocytic leukaemia had been in remission for 16 months when he developed a painful swelling of the right testis. Intravenous pyelography showed a non-functioning right kidney. Surgical exploration revealed a granulocytic sarcoma of the right kidney and a right nephrectomy was performed. The patient refused further treatment and relapsed 3 months after the nephrectomy. Autopsy revealed a large greyish-white tumour mass occupying the pelvis and retroperitoneal tissue. Special techniques with immunoperoxidase and naphthol-ASD chloro-acetate esterase staining confirmed the histological diagnosis of granulocytic sarcoma. The literature is reviewed and the rarity of this case is discussed.