Vol.101 No.11 contentsPRACTICA OTO-RHINO-LARYNGOLOGICA
Vol. 101 No. 11 November 2008
Clinical Study of Carcinomas of the External Auditory Canal
Seiji Hosokawa, Kunihiro Mizuta and Hiroyuki Mineta
(Hamamatsu University School of Medicine)
Carcinoma of the external auditory canal is infrequent and the prognosis is poor, especially in the advanced stage. Over the 15-year period, from 1992 to 2006, 17 patients with carcinoma of the external auditory canal were treated in our hospital. Eight patients (47％) were male, and nine (53％) were female. The mean patient age was 60 years old, ranging from 24 to 82 years. On pathological analysis, 11 patients (65％) showed squamous cell carcinoma, four (24％) adenoid cystic carcinoma, one (6％) basal cell carcinoma, and one (6％) verrucus carcinoma. Thirteen patients underwent external canal resection, lateral temporal bone resection, or subtotal temporal bone resection. Four advanced patients treated with radiation or chemotherapy without surgical treatment died within one year. The 3-year survival rate was 76.5％, and the 5-year survival rate was 68.0％ using the Kaplan-Meier method. The main finding of this study was that radical resection is a reasonable approach and postoperative radiotherapy is helpful for carcinoma of the external auditory canal.
Key words :clinical study, carcinoma of the external auditory canal, 5-year survival rate