Recurrent psoas abscess.

Recurrence of a psoas abscess in exactly the same location is very unusual--in fact, we found no other reports in the literature. Laparotomy performed after the patient presented with the second abscess revealed an impacted calculus and diverticulitis of the appendix as the cause. Computed tomography was effective in establishing the diagnosis, but the question of the best method of treatment remains. Percutaneous drainage was insufficient in this case.