CT findings of periappendiceal abscesses

CT has been widely used in the diagnosis of intra-abdominal abscesses, but its findings of periappendicealabscesses are not well known. CT findings of 15 cases of periappendiceal abscesses were analyzed retrospectively.The results were as follows: 1. The most prevalent age groups were 5th. & 6th. decades and a male to female ratiowas 7:8. 2. CT findings of periappendiaceal abscesses were cystic low density mass in 7 cases(46.5%), solid softtissue mass in 2 patients(13.5%) and mixed density mass in 6 cases(40%). 3. Associated CT findings were fat planeobliteration in 12 cases(80%), fascial thickening in 10 cases(66%), enhancing wall in 7 cases(46.5%), internal airdensity in 5 cases (33%), cecal wall thickening in 3 cases (20%) and ascites in 2 cases(13.5%). 4. Abscess waslocalized in RLQ medial to cecum in 10 cases(66%), extended to posterior pararenal space in 2 cases(13.5%), pelviccavity in 2 cases(13.5%) and RUQ in 1 case(7%). We think that CT is an useful diagnostic method of periappendicealabscesses especially when clinical findings are atypical.