A case of a neonate with Beckwith-Wiedemann syndrom is presented. Ante
natal sonography detected a right adrenal cystic mass confirmed in pos
tnatal which resolved spontaneously within 1 month. The child develope
d an adrenal adenoma detected by abdominal sonography at six months of
surveillance. The authors reveiw the different adrenal lesions possib
ly associated with Beckwith-Wiedemann syndrom and specially the pseudo
-tumorous lesions. The value of abdominal sonography in the neonatal p
eriods and in the surveillance of children with Beckwith-Wiedemann syn
drom is emphasized.