A phase I-II Study of Bi-weekly Docetaxel Combined with Radiation Therapy for Patients with Cancer of the Larynx/hypopharynx

Background: We performed a phase I/IIstudy of bi-weekly docetaxel in combination with concurrent radiotherapy to enhance the cytotoxic effect and radiosensitization and improve the rate of laryngeal preservation. Methods: Patients with T2N0-1M0, T3N0M0 hypopharyngeal cancer or T2N0-1M0, T3N01M0 larynx cancer were enrolled. Docetaxel was administered bi-weekly (days 1, 15, 29) from the first day of radiotherapy, while 2 Gy/day of radiation was given on 5 days weekly from day 1, reaching a total of 60 Gy in 30 fractions. Results: 12 patients took part in the phase I study. The maximum tolerated dose (MTD) was 40 mg/m 2 and the recommended dose (RD) was determined as 35 mg/m 2 . The phase II study was conducted with docetaxel at 35 mg/m 2 for 25 patients. Treatment was completed without interruption in 24 patients, with a protocol implementation rate of 96%. The complete response rate was 100% in laryngeal cancer, and 80% in hypopharyngeal cancer, and total (including partial response) overall response rate was 100%. The laryngeal preservation rate was 96%, and the overall local control rate was 92%. All patients have been alive for at least 3 years without any recurrence. Conclusions: The chemoradiation therapy using bi-weekly docetaxel is an extremely effective treatment for cancer of the larynx/hypopharynx, provided that it is used for the specified stage of cancer.