| dc.description.abstract | Obturator internus muscle (OIM) abscess occurs rarely in adults. Accurate diagnosis is often hindered and delayed due to the
deep location of the abscess and the nonspecific clinical features. Even of rarer occurrence is rupture of the obturator internus
muscle abscess into the perirectal space and retroperitoneum causing extensive retroperitoneal necrotizing soft tissue
infection. We present a case of ruptured left OIM abscess, which initially presented with clinical features, which were
suspected as acute pancreatitis. Contrast-enhanced multidetector computed tomography (MDCT) of the abdomen and
pelvis revealed ruptured left OIM abscess with extensive fat stranding, fluid collections, and pockets of gas throughout the
perirectal space, perisigmoid space, and bilateral posterior pararenal and anterior pararenal spaces as well as thickening of
bilateral anterior renal fascia, posterior renal fascia, and lateral conal fascia. These CT findings were consistent with
extensive retroperitoneal necrotizing soft tissue infection secondary to ruptured left obturator internus muscle abscess.
Broad-spectrum antibiotics were instituted immediately, and the patient was urgently worked up for drainage of the
abscess and debridement of the necrotic material. However, the patient’s condition deteriorated quickly before the surgical
interventions were performed and slipped into septic shock. Emergency resuscitative measures were unsuccessful, and
unfortunately, the patient died. The case represents a rare pathology with an unusual presentation, which can be fatal if
diagnosis and treatment is delayed. | en_US |
