[Primary leiomyosarcoma of the kidney. A case report].

Primary sarcomas of the kidney are exceptional, representing 1 to 3% of all renal tumours in adults. They have a poor prognosis. The authors report a case of primary leiomyosarcoma of the kidney in a 44-year old patient, presenting in the form of low back pain and haematuria. Treatment consisted of radical nephrectomy. Two months later, the patient presented with hepatic metastases. The patient is currently receiving chemotherapy.