Fraley's Syndrome: A Rare Cause of Obstruction of the Collecting System.

Fraley's syndrome is a rare cause of obstruction of the collecting system. It results from an extrinsic vascular compression of a calyceal infundibulum by a branch of the renal artery. Clinicians should be aware of this syndrome when facing an isolated dilatation of a calyx, classically an upper pole calyx dilatation, with a defect in the superior infundibulum on CT urography. Here, we pictorially present the conservative surgical treatment of a Fraley's syndrome. After identification of the artery responsible for the obstruction, the infundibulum was opened, uncrossed from the vessel, and closed by an end-to-end anastomosis.