[A case of adenoid cystic carcinoma of the thoracic esophagus after neoadjuvant chemotherapy].

A 60-year-old man was admitted to our hospital with a tumor in the thoracic esophagus, and squamous cell carcinoma was detected by endoscopic biopsy. On computed tomography, the tumor was suspected of having invaded adjacent organs by so the patient was given neoadjuvant chemotherapy consisting of low-dose CDDP and 5-FU. After 2 courses of chemotherapy, a subtotal esophagectomy was performed. The resected specimen showed no residual squamous cell carcinoma but another tumor was found in the submucosal layer which had a cribiform pattern in a solid nest. The tumor cells were positive for S-100 protein and an Alcian-blue-positive substance in the gland, so the tumor was diagnosed as an adenoid-cystic carcinoma.