Rapid weight loss is a symptom of many types of cancer. In nasopharyngeal carcinoma, weight loss is incredibly common, but tends to start after treatment has begun. Radiotherapy can have an adverse effect on food consumption by leaving the mouth too sore to eat anything and decreasing appetite. Though studies are not concrete, research suggests people with lower body mass indexes (BMI) may be more susceptible to recurrences of nasopharyngeal cancer.

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