Accelerated radiotherapy, carbogen and nicotinamide (ARCON) in locally advanced head and neck cancer: a feasibility study

Radiotherapy and Oncology : Journal of the European Society for Therapeutic Radiology and Oncology
M I SaundersA M Rojas

Abstract

ARCON (Accelerated Radiotherapy, CarbOgen, Nicotinamide) achieves a large therapeutic gain in rodents. A phase I/II study was therefore undertaken to determine its feasibility in patients with locally advanced head and neck cancer. The accelerated regime CHART was used in 35 patients given carbogen and/or nicotinamide with 11 small volume fractions. Eight patients received carbogen, 12 received nicotinamide and 15 were treated with ARCON. Treatment compliance, side-effects and acute mucositis were monitored in all cases. All patients underwent CHART as intended. In the 23 patients receiving carbogen, two failed to complete treatment. Compliance with nicotinamide was much lower. Out of 25 patients, only 52% received 10-11 doses of the 80 mg/kg/day of the drug. The most common side-effect was nausea and vomiting, which responded to standard anti-emetics in almost half of the patients. Historical comparisons with the CHART head and neck trials indicate that there was no increase in the severity of acute mucositis in any of these patients. Although the observation period is not sufficiently long to be definitive (median 20 months) there is no evidence of an increase in late normal tissue reactions. ARCON using CHART as the radiothe...Continue Reading

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