Adenosquamous Carcinoma of the Ethmoid Sinus with Intracranial Extension.

Adenosquamous carcinoma of the nasal cavity and paranasal sinuses is very rare. We report a 56-year-old man with adenosquamous carcinoma of the left ethmoid sinus extending to the anterior skull base. Chief complaints of the patient were left nasal obstruction and left epistaxis. CT scan and MRI revealed a tumor shadow in the left ethmoid sinus extending to the nasal cavity, the left maxillary sinus, and the anterior skull base. Concomitant chemoradiotherapy (CBDCA+radiation) was performed preoperatively. Using a combined craniof acial approach, the tumor was completely removed, including the anterior skull base. There has been no evidence of recurrence for two years and six months since the operation.