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If the exact radiation dosage is not known, what are some signs that an area has received high doses

There are several signs associated with high doses of radiation therapy to the head and neck. These include loss of facial hair growth, profound xerostomia (dry mouth), tissue induration, and taste loss. Patients sometimes experience mucosal telangiectasia, characterized by small dilated blood vessels along the mucosa inside the mouth. Often, a quick marker of where the radiation was delivered can be detected by noticing where a man’s beard line has stopped.

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