American Journal of Roentgenology, Vol 158, 833-835, Copyright © 1992 by American Roentgen Ray Society

ARTICLES

Delayed spontaneous rupture of augmented bladder in children: diagnosis with sonography and CT

RB Glass and HG Rushton
Department of Diagnostic Imaging and Radiology, Children's National Medical Center, Washington, DC.

With the increasing use of augmentation enterocystoplasty to treat patients with small-capacity, noncompliant bladders, an increase in the number of cases of delayed spontaneous intraperitoneal rupture of the augmented bladder has been reported. Although patients with a ruptured bladder usually will have an acute abdomen, these clinical signs and symptoms may be masked in spina bifida patients because of their neurologic deficit. Cystography and sonography were performed in four spina bifida patients with delayed spontaneous rupture of an augmented bladder. One patient also had isotope cystography. Two patients were examined with CT. Cystographic findings were abnormal in only one case. Peritoneal fluid was identified sonographically in all four cases and also was seen in both CT studies. Our study reveals that enhanced cystography will frequently fail to show leakage from an augmented bladder. Sonography and CT are reliable in detecting free intraperitoneal fluid, a finding that can significantly aid in the diagnosis of ruptured bladder after enterocystoplasty. Therefore, cystography with normal findings must be followed by sonography or CT in order to detect extravasated urine.
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