Ruptured Obturator Internus Muscle Abscess Causing Extensive Retroperitoneal Necrosis

Figure 1

(a) Axial CT scan of the abdomen and pelvis through the hip joints showing abscess (gas and fluid) in the left obturator internus muscle (arrow). Gas (arrowhead) and fat stranding (asterisk) are also seen in perirectal space. (b) Axial CT scan of the abdomen and pelvis at level below the hip joints showing site of the left OIM abscess rupture (arrow). In addition, inflammatory fluid (arrowhead) is seen in perirectal space.

(a)

(b)