A Real-world Observational Study of a Mucosal Contouring Method for Radiation-induced Oropharyngeal Mucositis

This study observes patients receiving radiation treatment for nasopharyngeal cancer (a type of head and neck cancer) to evaluate a new method of planning radiation that aims to reduce painful mouth sores (mucositis) — one of the most common and painful side effects of head and neck radiation therapy. **You may be eligible if...** - You are 18 years or older - You have been diagnosed with nasopharyngeal carcinoma (a cancer at the back of the nose/throat) - You are currently undergoing radical radiotherapy or combined chemotherapy and radiation - Your treatment records of mouth sore grading and pain during swallowing are complete and regularly documented **You may NOT be eligible if...** - You have poor dental hygiene, untreated gum disease, or metal dental work - You have uncontrolled heart disease or poorly managed diabetes - Your body mass index (BMI) is below 18.5 (underweight) - The study researchers determine you are unsuitable for other reasons Talk to your doctor to see if this trial is right for you.