05Mar 2023
Intensity-modulated radiotherapy for nasopharyngeal cancer: Is targeting the tumor more important than sparing healthy tissue?

Intensity-modulated radiotherapy for nasopharyngeal cancer: Is targeting the tumor more important than sparing healthy tissue?

The present study discusses the treatment of T4 nasopharyngeal carcinoma (NPC) using intensity-modulated radiation therapy (IMRT) and the potential impact of dose constraints on critical organs at risk (OARs) on tumor control. The study involved a single-institute cohort of patients diagnosed with T4 NPC between July 2005 and December 2010, treated with IMRT, and reclassified according to the 7th-AJCC stage. The study found that the average doses for various central nervous system (CNS) OARs exceeded published guidelines, but no clinical toxicities were seen during the follow-up period, except for temporal lobe necrosis in 13% of patients. The study concludes that it is feasible to maximize gross tumor volume dose coverage while exceeding most CNS OAR constraint standards, with ideal local control and no obvious increase in craniocerebral toxicity.

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