Background and Objectives：The malignances of external auditory canal(EAC) are very rare diseases and have very poor prognosis. Numerous staging systems have been proposed to classify patients before treatment. To treat the diseases, multimodal therapy is performed. The aim of this study was to review our experiences of the treatments for the malignances of EAC, and to propose most effective treatments according to the stage. Subjects and Method：Twenty-one patients with the malignances of EAC diagnosed between November 1994 and December 2009 were analyzed. The patients were analyzed according to the Pittsburgh staging system and histopathological findings. Results：The number of patients staged as T1, T2, T3, and T4 were 4, 2, 2, and 13, respectively. Surgical treatments were performed in 13 patients using lateral temporal bone resection, subtotal temporal bone resection. Initial or postoperative radiotherapies were performed in 13 patients. After the treatment, the mean disease free survival periods of 5 patients (23.8%) who are still alive without the disease was 27.8 months, and 4 patients (19%) expired within the mean periods of 11.8 months. Conclusion：We suggest that en-bloc resection with or without radiation therapy is the best treatment for the malignancies of the external auditory canal. A positive resection margin or residual tumor should be considered as worst prognostic factor.
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