CT has been widely used in the diagnosis of intra-abdominal abscesses, but its findings of periappendiceal abscesses are not well known. CT findings of 15 cases of periappendiceal abscesses were analyzed retrospectively. RESULT: 1. The most prevalent age groups were 5the. & 6th. decades and a male to female ratio was 7:8. 2. CT findings of periappendiaceal abscesses were cystic low density mass in 7 cases, solid soft tissue mass in 2 patients and mixed density mass in 6 cases. 3. Associated CT findings were fat plane obliteration in 12 cases, fascial thickening in 10 cases, enhancing wall in 7 cases, intrnal air density in 5 cases, cecal wall thickening in 3 cases and ascites in 2 cases. 4. Abscess was localized in RLQ medial to cecum in 10 cases, extended to posterior pararenal space in 2 cases, pelvic cavity in 2 cases and RUQ in 1 case.