Actinomycosis of an Appendix with a Cecal Abscess

Hiromi Ono, Hitoshi Yokoyama, Haruyuki Yoshida, Hiraku Fukushima, Masato Kawakami, Mikio Okamura, Takanori Aoki, Naoki Asakage, Yasushi Danjo, Kimimoto Nagashima, Hideyuki Hayashi, Hiroshi Nishihara, Yuichi Shimizu, Tsuyoshi Shimamura, Mitsuo Kusano


Appendicitis has an etiology of appendiceal actinomycosis and chronic inflammation in only 0.01-0.06% of the cases, and less than 10% of these cases are diagnosed before surgery. Here we report the case of a 27-year-old Chinese female who was referred to our hospital with right lower abdominal pain and a high fever. Abdominal computed tomography (CT) scan revealed an abscess around the cecum. Appendectomy was performed on the same day, and a tumor-liked edematous appendix was observed. Appendiceal actinomycosis was diagnosed pathologically. A combination of antibiotic therapy and operative treatment resolves actinomycosis in 90% of cases.


Actinomycosis; Appendiceal actinomycosis; Cecal abscess; Perforated appendicitis

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