A CASE OF POLYPOID ESOPHAGEAL BASALOID CELL CARCINOMA ACCOMPANIED WITH A WIDESPREAD SUPERFICIAL SQUAMOUS CELL CARCINOMA

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A 60-year-old male complaining of difficulty in swallowing and loss of body weight was admitted to our hospital on September 19, 2002. Upper GI endoscopy showed a protruding tumor, 25mm in diameter, on the anterior wall of the middle esophagus. The surface structure of the tumor was clarified as a gyrus-like pattern with indigo staining. The tumor and its peripheral mucosa were not dyed by iodine staining. The diagnosis of the tumor by biopsy was squamous cell carcinoma. Surgical resection of the thoracic esophagus and cardia of the stomach was performed on October 30. Histologically, a widespread non-staining area with iodine revealed squamous cell carcinoma and the protruding tumor was a basaloid cell car-cinoma. Most part of the tumor invasion was limited within the submucosal layer, but a tiny portion invaded the muscularis propria. In general, the shape of this type of tumor was a slightly elevated mass resembling a submucosal tumor because this tumor tended to grow laterally in the submucosal layer. In our case, however, the tumor sharply grew upward and became a polypoid mass consequently.
社団法人日本消化器内視鏡学会の論文