American Journal of Roentgenology, Vol 130, Issue 3, 463-464
Copyright © 1978 by American Roentgen Ray Society
Transverse folds in the proximal ureter: a normal variant in infants
DR Kirks,
G Currarino,
and
AG Weinberg
Infants frequently have a "corkscrew" appearance of the upper segment of the ureter at excretory urography. In most instances, this tortuous appearance is due to thin transverse folds. These folds are full-thickness inward projections of the ureteral wall. They are believed to represent a persistence of normal fetal tortuosities of the ureter.