Hypofractionated chest radiotherapy has been used as an alternative when standard fractionated schedules are neither practical nor feasible. To explore docetaxel as radiosensitizer in a hypofractionated chest irradiation schedule, a docetaxel dose escalation study was conducted in which 26 patients with advanced non-small-cell lung cancer (NSCLC) (stages III and IV) were enrolled. Docetaxel was administered 24 hours prior to irradiation (starting dose 10mg/m2; escalating in 5mg/m2 increments). Radiation was administered at 500 cGy (one fraction) once/wk for 10 consecutive weeks (5000 cGy total). The docetaxel dose was escalated up to 45 mg/m2/wk. The treatment was well tolerated over 10 consecutive weeks without requiring dose reductions or interruptions. Toxicities were mainly docetaxel related. One of 19 evaluable patients had a complete radiographic response within the radiation treatment port, 13 had a partial response, and 5 had stable disease. No patient recurred within the radiation field. Three patients who underwent surgical resection following treatment were pathologically down staged to stage I. This trial of a small group of patients supports, in selected patients, synchronous administration of effective hypofractionated, radiosensitized radiation therapy and optimized systemic chemotherapy.
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