Iodination of Proteins in Hair Illustrated by Post-Therapy I-131 Whole-Body Scanning

摘要

We present a case with I-131 whole-body scanning after I-131 radioablative treatment. I-131 whole-body scan was obtained 5 and 8 days after I-131 radioablative treatment. Intense I-131 accumulation above the right shoulder represented radioactive physiologic saliva contamination over the patient's hair due to drooling during sleep. The radioactive contamination over the patient's hair could not be wiped off because I-131 was bonded into tyrosine and histidine configuration, which are major amino acids responsible for hair.