A Mucosal Contouring Method Based on Swallowing-induced Breakthrough Pain for Radiation-induced Oropharyngeal Mucositis

This study is developing a radiation treatment planning method that uses patients' self-reported pain during swallowing to more precisely target the most painful areas inside the mouth and throat, potentially reducing side effects during cancer treatment. **You may be eligible if...** - You are 18 or older - You have been diagnosed with nasopharyngeal carcinoma (a type of head and throat cancer) confirmed by biopsy - You are currently undergoing radiation therapy or combined radiation and chemotherapy - You have complete records of your mouth/throat mucositis grading and pain ratings **You may NOT be eligible if...** - You have poor oral hygiene or untreated dental disease or metal dental restorations - You have uncontrolled heart disease or poorly controlled diabetes - Your body mass index (BMI) is below 18.5 (underweight) Talk to your doctor to see if this trial is right for you.