Painful perineal swelling. Admitted under surgical team.
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Thick walled enhancing collection with small internal septations between the anorectum and intriotus.
Strong internal diffusion restriction.
Separate smaller subcutaneous cyst in the right glueteal region.
An example of a perineal abscess - perhaps overkill to have required an MRI, but nevertheless it demonstrates the pathology nicely.
Likewise the appearances on DWI/ADC in abscess are well shown with avid internal diffusion restriction.
The abscess spontaeneously burst whilst awaiting incision and drainage.