Figure 3
Magnetic resonance imaging of the pelvis demonstrated large, complex, multiple lobulated abscesses with lower central attenuation and peripheral enhancement from the left ischiorectal fossa to the left iliacus muscle, iliopsoas muscle, and adductor muscle. (A, B) One large complex abscess in the ischiorectal fossa with mass effect to the rectum. (C, D) Abscess extending to the iliopsoas muscle and iliacus muscle with multiple loculation.