Maiden waist deformity

Last revised by Yuranga Weerakkody on 8 Nov 2023

A maiden waist deformity or sign is a name given to the appearance when there is medial deviation of both ureters. This typically occurs in retroperitoneal fibrosis or unilaterally in cases where there is a retrocaval ureter. In the former, there is medial indrawing of the ureters due to deposition of fibrous tissue in the retroperitoneum at the level of the lumbosacral junction. Due to involvement of both ureters, the course of the medially-drawn ureters is said to have the appearance of the narrow waist of a maiden, thus giving it its name.

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