A rare presentation of hyperthyroidism: T3 thyrotoxicosis related to bilateral pitting edema of the leg

Thyrotoxicosis is a clinical state of inappropriately high levels of circulating thyroid hormones (T3 and/or T4) in the body from any cause. In the literature, bilateral pretibial pitting edema in hyperthyroidism cases has been reported in a few case reports. We report a case of T3 Thyrotoxicosis who had leg swelling for three weeks and whose finding regressed rapidly with treatment. Diffuse, bilateral pitting pretibial edema, which may occur due to many etiologies, should also be considered in the differential diagnosis of hyperthyroidism.