[Arterial hypertension caused by extrinsic compression of the renal artery of tumor origin in a child].

Stenosis of the renal artery secondary to an extrinsic acquired compression of the renal artery because of a tumor is rare. We report two cases. The first case is a boy of 14 months with a large neurogenic tumor from the right renal plexus with compression of the right renal artery. The second case is a girl of 2 years which had a neuroblastoma displacing the right kidney. The right renal vessels were invaded by very calcified solid masses and the removal was very difficult. Arterial hypertension secondary to an acquired unilateral renal stenosis may be healed definitely thanks to surgery.