[Early-stage carcinoma of the external auditory canal treated by intracavitary irradiation with HDR 192Ir-RALS: a case report].

We report a case of early-stage carcinoma of the external auditory canal treated by intracavitary irradiation with high-dose-rate (HDR) 192Ir-RALS after 40 Gy by external irradiation. We made an applicator that was inserted into the external auditory canal for the intracavitary irradiation, using a 9 Fr silicone catheter and resin. The total intracavitary radiation dosages were 20 Gy/8 Fr/4 weeks. No severe side effects were noted, and the tumor disappeared. RALS may be indicated for early carcinoma of the external auditory canal for its efficacy and lack of side effects.