PMC9637884_01
Magnetic resonance with contrast of the pelvis showing an axial view of the perianal abscess.
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A pelvic MRI with contrast showed an extensive 8.6 cm multiloculated thick-walled fluid collection (Fig. 1) within the right perineum consistent with an abscess with inflammatory changes extending towards the left peritoneum, right ischio-anal fossa, and prostate.