Abstract:Objective:To investigate the clinical effect of subtotal temporal bone resection in adenoid cystic carcinoma of external auditory canal. Methods:8 patients with adenoid cystic carcinoma of external auditory canal treated in our department from 2015 to 2019 were retrospectively analyzed, including 2 males and 6 females, aged 33-76 years, with an average age of 55.6 years. 7 cases had earache, 6 cases was found mass in the external auditory canal , 6 cases had ear discharge, 6 cases had hearing loss, and only one case had facial paralysis. The mean time from the first symptom to diagnosis was 2.75 years. 5 cases had been misdiagnosed and 3 cases had been mistreated. Six patients underwent subtotal temporal bone resection and superficial parotid gland resection, and two patients underwent subtotal temporal bone resection and total parotid gland resection. Results:During the perioperative period, local incision infection occurred in one case and cerebrospinal fluid leakage occurred in one case. The mean follow-up was 4.34 years. Six patients survived without cancer. One recurrent patient developed local recurrence with pulmonary metastasis 3 years after the second operation in our hospital. And she received radiotherapy, and now living with tumor. One patient died of other diseases during 3.5 years of follow-up. Conclusion: The early symptoms of adenoid cystic carcinoma of external auditory canal were not typical and easy to be misdiagnosed. The subtotal temporal bone resection is performed to achieve complete resection of the tumor. And the parotid gland should be treated at the same time. Postoperative radiotherapy is also an alternative complementary therapy.