[Nephroblastoma in the adult. Apropos of a case]

Nephroblastoma is a rare tumour in the adult and the diagnosis is only rarely made preoperatively. In the light of a new case, the authors consider the problems of histopathological differential diagnosis with other borderline forms. They study the clinical aspects of these tumours. The prognosis would seem to be extremely gloomy, worse than that of renal adenocarcinoma.