Testing carbon ion radiation alone for rare head and neck tumors

This trial is testing carbon ion radiation as a standalone treatment for adenoid cystic carcinoma, a rare slow-growing cancer of the head and neck region. Carbon ions are a type of radiation that can be aimed very precisely at tumors and may be more effective than standard radiation. The study hopes to show that using carbon ion radiation alone (rather than combined with other radiation) can improve the chances that the tumor won't come back.

Adenoid cystic carcinoma often comes back after treatment, and patients typically need radiation therapy more than once. While some hospitals combine carbon ions with standard radiation, there's no strong evidence from Europe about whether carbon ion radiation alone works better—or whether it could shorten treatment time and reduce side effects.