Revision 3 for 'Drooping lily sign'
Drooping lily sign
The drooping lily sign is a urographic sign in some patients with a duplicated collecting system. It refers to the inferolateral displacement of the opacified lower pole moiety due to an obstructed (and unopacified) upper pole moeity.
The similarity to a lily is further strengthened by the small number of calyces the lower pole moiety has.