Abstract
We experienced a case of early basaloid carcinoma concomitant with early squamous cell carcinoma of the esophagus. Though the 54-year-old man was diagnosed as having an esophagealcarcinoma by endoscopic examination, he refused treatment. Three years and six months later, esophageal carcinoma was again detected. Previous endoscopic examination had revealed a superficially depressed lesion at 26 cm and a submucosal mass with an eroded surface at 30cm from the incisor level. The former was probably confined to the mucosal layer, the latter to the submucosal layer. Endoscopic examination at admission revealed that both tumors seemed to have enlarged slightly. Subtotal esophagectomy with regional lymph node disection was carried out under right thoracotomy and laparotomy. Histopathologic examination of the resected specimen revealed two mucosal cancers, one of which tumor was newly found by histologic examination, and a submucosal cancer without lymph node metastasis. Histologically, the mucosal tumors were well-differentiated squamous cell carcinoma and the submucosaltumor was basaloid carcinoma. Such multiple esophageal cancers followed for a long time retrospectively are very rare. Furthermore, this case is interesting for its histogenesis and the malignantbehavior of the eso-phageal carcinoma.
