A case of right psoas abscess associated with appendical diverticulum

Abstract

A 36-year-old man was admitted to our hospital because of right back pain and fever. Abdominal CT scan revealed a right psoas abscess, and an operation was performed for drainage by an extraperitoneal technique. The postoperative course of the patient was uneventful. Colonoscopy was performed, and there were no abnormal findings in the right side colon, so the patient was discharged. Six months later, the psoas abscess relapsed. Percutaneous drainage was performed under echoguide. Barium enema revealed a fistula between the perforated site at the tip of the appendix and abscess cavity. An appendectomy was performed, and histological examination showed diverticulum, lacking muscularis propria at the perforated site. There has been only one case report in the Japanese literature on psoas abscess that followed perforation of the appendical diverticulum. We thus reported the case with a review of the literature.