[A rare case of idiopathic staghorn urolithiasis in childhood. Imaging diagnosis]. / Raro caso di urolitiasi idiopatica a stampo in età pediatrica. Diagnostica per immagine.

The authors describe one case of kidney staghorn lithiasis in a little patient 1 1/2 years old, as complication of a megacalycosis with associated pyelo-ureteral junction dysplasia. They underline the value of ultrasound both as a first examination and, particularly, in the follow up because of the non invasivity of the technique and the correct information about the persistence of calculi and dilatation.

[Mega-poly-calicosis. Apropos of a case with prenatal and postnatal diagnosis]. / Mégapolycalicose. A propos d'un cas avec diagnostic anté-natal et postnatal.

We report the first published case of megapolycalicosis with prenatal ultrasound diagnosis. Pyeloureteral junction dysplasia was observed only after delivery. The etiopathogenesis of megapolycalicosis (MPC) and its hypothetical association with uretero-pelvic junction obstruction are discussed. Presence of polycalicosis, good glomerular filtration and absence of compensatory controlateral renal hypertrophy are determinant in the diagnosis.