[Mesoblastic nephroma. Unusual renal tumor in adults. Apropos of a case]

We report an observation concerning a girl 18 years old, who present a nephroma discovered following nephric colic and total and intermittent hematuria. The anatomo-pathological examination reveals a mesoblastic nephroma. This type of tumour with mild appearance is scarce in old child and exceptional in adult. In almost the whole of cases, it occurs in newborns and mursling from which designation of congenital mesoblastic nephroma is derived. Its good prognosis justifies its classification separately, out of nephroblastoma.