Asymptomatic primary mucinous cystadenocarcinoma of the appendix with a large abdominal mass: Report of a case |
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Authors: | Akihiko Suto Akira Tsuyuki Nobuyoshi Hiraoka Yasuhiro Hosoda Kiyoshi Kikuchi Yasuo Fujishir |
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Affiliation: | (1) Department of Surgery, Tokyo Denryoku Hospital, 9-2 Shinanomachi, 160 Shinjuku-ku, Tokyo, Japan;(2) Department of Pathology, School of Medicine, Keio University, 35 Shinanomachi, 160 Shinjuku-ku, Tokyo, Japan;(3) Department of Surgery, Yamato City Hospital, 8-3-6 Fukami-nishi, 242 Yamato, Kanagawa, Japan |
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Abstract: | A case of cystadenocarcinoma of the appendix with a large cystic lesion is reported. A 49-year-old man undergoing a routine ultrasonic scan was incidentally found to have an abdominal mass measuring some 30 cm in size. The clinical presentation was asymptomatic, and the patient underwent a laparotomy without ascertaining a diagnosis preoperatively. The lesion, which derived from the appendix, was removed and was found to be cystic and contained huge amounts of mucin. The histological findings revealed a well-differentiated cystadenocarcinoma of the appendix, and immunohistochemical staining of the epithelium and mucinous implants in the mass demonstrated a positive reaction for carcinogenic antigens, including carcinoembryonic antigen and carbohydrate antigen. |
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Keywords: | Adenocarcinoma of the appendix CEA CA199 |
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