A case of primary adenocarcinoma of the cervical esophagus arising from the ectopic gastric mucosa

Adenocarcinoma of the cervical esophagus arising from the ectopic gastric mucosa is a rare form of tumor, and only 25 cases have been reported previously. We present a case of a 74-year-old man who complained of dysphagia. Esophagogastroduodenoscopy revealed an elevated lesion located on the right posterior wall of the cervical and upper thoracic esophagus. Total esophagectomy and three-field lymph node dissection was performed. The tumor was 7.3 cm × 4.5 cm in size and of an ulcerative and localized type. Microscopic examination revealed a papillary adenocarcinoma with invasion to the adventitial layer. Its origin was diagnosed as ectopic gastric mucosa in the cervical esophagus, which lay adjacent to the tumor.