Case report: primary adenocarcinoma of the thoracic esophagus that probably originated in the esophageal gland - Okuda, Hiroyuki; Endo, Takao; Suzuki, Kazuya; Tanaka, Hiroki; Yonezawa, Kazuhiko; Abe, Takashi; Yoshida, Yutaka; Imai, Kohzoh (Nippon Shōkakibyō Gakkai zasshi, 2005)