Abstract

Acute appendicitis is the most common cause of emergency admissions all over the world. Perforation, abscess, plastron and fistula formation into adjacent organs are among the most serious complications of acute appendicitis. In the literature, many case reports have been published on colo-appendiceal fistula secondary to inflammatory bowel diseases and the development of diverticulitis. However, only a few case reports have been presented in colo-appendicular fistulisation secondary to complicated appendicitis. Here, we present a 46-year-old male patient who developed periappendicular abscess formation and sigmoid appendiceal fistula after appendix perforation. . In the colonoscopy upon pus discharge from the anus, purulent material in the lumen was observed about 25 cm proximal of the anal verge at the sigmoid colon with a view of external compression.Another interesting aspect of this patient is that the fistula mouth in the sigmoid colon, which could not be displayed during the operation, was spontaneously closed.

Key words: Appendicitis; Abscess formation; fistulization; sigmoido-appendiceal fistulization.