Hyperthyroidism Incidentally Noted on Lymphoscintigraphy

A 43-year-old woman with edema in both left upper limb and lower limb underwent lymphoscintigraphy to evaluate possible lymphedema. Two separate lymphoscintigraphies, one for the lower and the other for the upper limbs, were performed with interval of 3 days. Incidentally, an activity in the region of the thyroid glands was noted in the delayed images of both studies. Subsequently, Graves disease was diagnosed based on the patient's symptoms and the results of laboratory examinations.