[en] We describe the case of a 72-year-old woman who displayed massive multiple intramural gas collections of the bladder wall as an incidental finding on CT. The patient presented with critical ischemia of the left leg caused by paradoxical arterial embolism, raised corpuscular sedimentation rate, anemia by gastrointestinal blood loss, hypoproteinemia, diarrhea, malabsorption, and exudative enteropathia caused by mycobacterial ileocolitis. The patient had no dysuria and there was no evidence of diabetes. The intramural gas collections of the bladder wall, as shown by CT, were compatible with emphysematous cystitis. Urine samples proved infection by a multi-resistant strain of E. coli. Emphysematous cystitis is a rare form of bladder infection that can be diagnosed by plain-film radiograms or CT. (orig.)