Radiation-induced nasopharyngeal ulcers after intensity modulated radiotherapy in primary nasopharyngeal carcinoma patients: A dose-volume-outcome analysis

The study indicates that radiation-induced nasopharyngeal ulcer is consistent with primary tumor location and 'hottest spots' regions and we suggest a D3cc limit of 73.67 Gy for the nasopharynx. Physicians should be cautious of such 'hot spots' in the nasopharynxduring IMRT treatment plan optimization, review and approval to avoid the most serious complication of radiotherapy for NPC.