During the past 20 years from 1971 to 1991,171 cases were hospitalized at the Department of Otolaryngology, Akita University Hospital for treatment of parotid gland tumors. Out of the 171 cases,135 cases were benign tumors, while 36 cases were malignant ones. We classified these tumors according to the WHO classification and investigated the incidence, location, surgical method and facial nerve paralysis of each tumor. The choice for treatment of parotid gland tumors is surgery, and the surgical methods with these tumors have been standardized. The surgical procedures should be recorded correctly according to the standard way and make postoperative evaluation accurately.
