Presentation
Dementia and constipation for investigation.
Patient Data
Age: 85 years
Gender: Male
From the case:
Emphysematous cystitis
Frontal

Scout image from the CT demonstrates mural gas in the bladder (green arrow).
From the case:
Emphysematous cystitis
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Axial C+ portal venous phase

Gas within the urinary bladder lumen and bladder wall are consistent with emphysematous cystitis.
Case Discussion
This patient presented with constipation on a background of dementia. The patient did not have any classic risk factors for emphysematous cystitis.