Iliopsoas abscess is rare in childhood and reported complications include septic shock, ileus and hydronephrosis. The authors encountered such a case in a 2-year-old girl with a huge left iliopsoas abscess adjacent to the sigmoid colon, descending downward into the groin area. Delayed sigmoid colonic perforation occurred after surgical drainage of the abscess. Local inflammation of the bowel wall due to irritation by the abscess may be the pathogenesis of intestinal perforation.
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