Percutaneous drainage of periappendiceal abscesses: review of 20 patients

Twenty patients with periappendiceal abscesses diagnosed by CT underwent percutaneous catheter drainage. Eighteen (90%) of the 20 patients were successfully treated by percutaneous drainage and antibiotic therapy alone. In two of these patients, however, small recurrent abscesses were diagnosed by CT 4 and 6 weeks after drainage, but these abscesses resolved with additional antibiotic therapy. Surgery was performed in two patients in whom percutaneous drainage failed. One was a diabetic patient who had a gas-forming abscess that extended into the posterior pararenal space. Surgery was necessary in a second patient because of a technical failure of catheter insertion, which resulted in perforation of the abscess cavity and peritonitis. Abscess sinograms in eight (44%) of 18 patients showed fistulas between the abscess cavity and the base of the cecum or appendix. However, the fistulas did not pose a problem in clinical management, and all closed within 14 days. Percutaneous drainage is an effective alternative to surgery in selected patients with periappendiceal abscesses.
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