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 gro
w a mixture of enterobacteria. The diagnosis is made by CT-scan. Medic
al therapy always results in recurrence of the abscess. Resection of t
he fistula and the affected bowel segment with end-to-end anastomosis
is the therapy of choice. A case report is presented, followed by a re
view of the literature.