A Case of Cyst Forming Choristoma of the Cervical Esophagus

Yoshihiko Sakurai, Makoto Miyakita, Koichi Yamataka, Noritaka Hayashi, Eishiro Tajika and Kazuhiko Shimizu^*

Department of Surgery and Pathology^*, Tochigi National Hospital

This paper describes a case of a resected submucosal tumor arising in the cervical esophagus, diagnosed as a cyst forming choristoma by histological findings. A 53-year-old man was seen at the hospital because of disturbance in swallowing and discomfort in the pharynx. A Submucosal tumor was detected by roentogenography, fiberscopic examination, and computed tomography. An operation was performed, and a pedunculated tumor was resected from the cervical esophagus. Histological findings revealed that the tumor was located in the esophageal submucosal layer and the muscularis mucosae was absent between the esophageal epithelium and the tumor. Macroscopically, the tumor consisted of cyst and lipoma-like adipose tissue. Seromucinous glands and cartilage were observed in the adipose tissue, and some of the excretory ducts dilated in various size. The cyst was lined by two-layered cuboidal epithelium which was histologically similar to that of the excretory ducts. The cyst was, therefore, considered to be formed by the dilatation of the excretory duct. The tumor was histologically diagnosed as cyst forming choristoma, which was formed by incomplete separation of the respiratory tract organ.

Key words
esophagus, cyst, choristoma

Reprint requests
Yoshihiko Sakurai Department of Surgery, Tochigi National Hospital 1-10-37 Nakatomatsuri, Utsunomiya, 320-0057 JAPAN

Accepted
March 31, 1999

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