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Drooping lily sign in duplex collecting system

Case contributed by Mohammad Taghi Niknejad
Diagnosis certain

Presentation

Left flank pain.

Patient Data

Age: 40 years
Gender: Male

Left sided duplicated collecting system with the upper moiety obstruction, and non-functioning. It displaces the lower pole moiety inferiorly, mimicking the appearance of a drooping lily.

Case Discussion

The drooping lily sign refers to the inferolateral displacement of the opacified lower pole moiety due to an obstructed (and unopacified) upper pole moiety in duplicated collecting system.

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