[Diagnostic value of percutaneous biopsy of the renal masses. 73 cases]. / Valeur diagnostique des biopsies percutanées des masses rénales. A propos de 73 cas.

The aim of this study is to evaluate the diagnostic value of percutaneous biopsies of renal masses with comparison of pathological data between the biopsies and the surgical specimens. Thus, we retrospectively studied 73 biopsies of patients, who were referred to our institution between 1995 and 1997. The mean age of the patients was 60 +/- 14 years with a male predominance (67%). Twenty per cent of the biopsies were negative. Eleven per cent of the biopsies were benign lesions (oncocytoma, angiomyolipoma, infectious lesions). For renal cell carcinomas, the correlation coefficient between biopsy histology and final pathology was 0.87. Conversely, it was only 0.36 for the Führman grading. Nevertheless, low (1-2) and high (3-4) grades were accurately separated (0.92). We conclude that the percutaneous biopsy is a useful tool for diagnosis of renal masses.

Malignant mullerian mixed tumor of the uterine cervix with adenoid cystic component.

Malignant mullerian mixed tumors of the uterine cervix are rare; <30 cases have been reported. We describe a new case in which the carcinomatous component was predominantly adenoid cystic carcinoma. Only one similar case has been reported.

[Clear cell sarcoma of the kidney relapsing after 10 years of asymptomatic evolution]. / Sarcome à cellules claires du rein récidivant après 10 ans d'évolution asymptomatique.

We report the case of a kidney tumor occurring in a thirteen year-old girl. This tumor was first diagnosed and treated as a benign one. After ten years without recurrence, a relapse occurred. The diagnosis was recurrent clear cell sarcoma of the kidney. The course in our case is uncommon because clear cell sarcoma of the kidney is a rare and aggressive pediatric neoplasm, usually characterized by a predilection for bone metastases, and a mid survival rate of 30 months without treatment.