The authors report two cases of renal multilocular cyst and review the case
s reported in the literature, revealing the original features of this benig
n tumour which has an equal incidence in children and adults with a controv
ersial acquired or malformative aetiopathogenesis, precise histological fea
tures, but a difficult preoperative and intraoperative diagnosis despite mo
dern imaging techniques. In the great majority of cases, treatment consists
in nephrectomy. (C) 2001 Editions scientifiques et medicales Elsevier SAS.