[Congenital mesoblastic nephroma in childhood. Our experience apropos of 3 cases].

Congenital mesoblastic nephroma (CMN) is a rare, generally benign renal tumor. A better knowledge of its natural history has changed the therapeutic approach. Currently, aggressive therapy must be exclusively reserved for the sarcomatous forms or Wilms' tumor with sarcomatoid features. The cell variant reported in our series was treated with efficacy by surgery alone. Early recognition of the lesion, preferably prenatally, is warranted in order to perform surgery early or detect hydrops fetalis, a possible complication of pregnancy.