drooping lily sign

droop·ing lil·y sign

in urography, a sign of a double renal collecting system, with an obstruction of the upper system depressing the opacified calyces of the lower system, so they appear to droop.

drooping lily sign

a deformity seen on IV urography of a duplex kidney, with the forcing of the lower collecting system and ureter outward and downward to resemble the shape of a drooping lily. It is caused by obstruction and dilation of the upper collecting system.
A descriptive term for a pattern seen at excretory urography in patients with duplicated renal collecting systems. The sign consists of inferolateral displacement of a functioning lower pole moiety and lateral displacement of the most superior calices of the lower pole collecting system, usually by a nonopacified, hydronephrotic upper pole collecting system. The appearance of the lower pole collecting system has been likened to a drooping lily