Abstract
A case of adenosquamous carcinoma of the mesopharynx is reported. Adenosquamous carcinoma of the head and neck is extremely rare, especially in the pharynx. A 63-year-old man who had a tumorous lesion, 25×20mm in diameter, at the right palatoglossal arch was diagnosed with adenosquamous carcinoma by preoperative biopsy. Thus, radical surgery was performed on the patient with no induction therapy. However, two years after the operation, metastatic lymphadenopathies were exhibited, resulting in death despite the use of radiotherapy. We review earlier literature and discuss the histogenesis, histopathologic characteristics and clinical features of adenosquamous carcinoma.