Fig. 4

Emphysematous cystitis in a 69-year-old man with congestive heart failure, diabetes and chronic obstructive lung disease, suffering from urinary frequency and pain. CT urography (a–d) revealed distended urinary bladder with linear gas-attenuation changes (thin arrows) along the right lateral and upper posterior walls. Associated findings included inflammatory stranding (+) of the perivesical fat planes and a small bilobated fluid-like intraprostatic collection consistent with abscess (arrowheads). Follow-up CT (e, f) 3 months later revealed resolution of changes after prolonged antibiotic therapy