Diagnostic Ultrasound - Abdomen and Pelvis

Ureters and Bladder
WEIGERT-MEYER LAW
Anatomy: Pelvis
Orthotopic ureter with ureterocele
Orthotopic ureter
Dilated ectopic ureter and ureterocele
Bladder
Ureterocele
Dilated right distal ureter
Nondilated lower pole collecting system
Dilated upper pole collecting system
(moiety)
(Top) Graphic illustrates orthotopic ureterocele in a single ureter system (left, upper) and ectopic ureterocele in a duplicated ureter
system (right, lower). Note the hydroureter accompanying the ectopic ureterocele. (Middle) Longitudinal oblique transabdominal
grayscale ultrasound at the suprapubic region shows a dilated ureter seen terminating in the ureterocele; the patient had complete
duplication of the collecting system (Weigert-Meyer law). (Bottom) Longitudinal transabdominal grayscale ultrasound through the
right kidney in the same patient shows a dilated upper pole moiety (the patient also had a dilated right ureter with ureterocele) with
decompressed inferior moiety (Weigert-Meyer law).
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