[Three cases of emphysematous cystitis].

Emphysematous cystitis is a rare form of acute cystitis presenting with gas collection in the bladder wall and lumen. We report three cases of emphysematous cystitis. The first patient was a 71-year-old woman with gross hematuria. Intravenous pyelography and cystoscopy revealed a characteristic gas collection in the bladder. The second patient was a 59-year-old man with abdominal fullness who was hospitalized for treatment of a cerebral infarction. Abdominal radiography and computed tomographic (CT) scan demonstrated emphysematous cystitis. The third patient was a 67-year-old man with diarrhea and abdominal pain after operation for rectal cancer. CT scan accidentally showed gas bubbles in the bladder wall and lumen. All of the cases, the symptoms were improved after treatment with antibiotics.