A common cause of pneumaturia is
colovesical fistula (communication between the colon and bladder). These may occur as a complication of
diverticular disease. Pneumaturia can also happen if a urinary catheter was recently in the bladder. Other key differentials: •
Crohn's disease •
Carcinoma of the
colon or
bladder • A gas-producing
UTI (
emphysematous cystitis: rare). • Emphysematous pyelonephritis. Male
scuba divers utilizing
condom catheters or female divers using a She-p external catching device for their
dry suits are also susceptible to pneumaturia. ==Diagnosis==