Saccular outpouching from herniation of bladder mucosa and submucosa through muscular wall of bladder

Most commonly near ureterovesical junction

Anechoic outpouching from bladder with narrow or wide neck, may empty with micturition

CT/MR: Fluid attenuation outpouching from bladder

Usually fills with contrast on excretory postcontrast phase

Urachus

Everted ureterocele

Paraovarian cysts in female

Pelvic cysts in male

Acquired: Most common secondary to chronic bladder outlet obstruction (60%)

Congenital: Hutch diverticulum (40%)

Vesicoureteral reflux

Narrow-neck diverticula: Urinary stasis → complications such as infection, stone, and ureteral obstruction

Secondary inflammation predisposes to development of carcinoma within diverticulum

Complications

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  Carcinoma

  
  
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  Vesicoureteral reflux

  
  
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  Ureteral obstruction

Look for debris, calculi, or solid masses in diverticula, which can indicate complication

Color Doppler may show jet to and from diverticulum to bladder; do not mistake for ureteral jet