Psoas abscess. A rare complication of Crohn's disease.

Psoas abscess complicating Crohn's disease is a rare condition. Fever, abdominal tenderness, limb pain and hip contracture are typical signs but only present in half of the cases. Cultures of the pus mostly grow a mixture of enterobacteria. The diagnosis is made by CT-scan. Medical therapy always results in recurrence of the abscess. Resection of the fistula and the affected bowel segment with end-to-end anastomosis is the therapy of choice. A case report is presented, followed by a review of the literature.