131-I diagnostic scan in metastatic thyroid cancer

Whole-body scan of a 45-year-old female with metastatic follicular thyroid carcinoma. A = physiologic nasopharyngeal 131-I excretion; E = 131-I in gastrointestinal tract; and G = 131-I in the bladder. Metastatic foci are present in the right shoulder (B), left humerus (C), right lung and ribs (D), and T12 vertebra (F). The patient was subsequently treated with 200 mCi (7400 MBq) of 131-I.