Drooping lily sign (ureter)

Last revised by Mohammad Taghi Niknejad on 16 Jul 2018

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 moiety.

The similarity to a lily is further strengthened by the small number of calyces the lower pole moiety has. 

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