Ectopic thyroid tissue is a result of abnormal migration of thyroid tissue during the embryonic state. Most of these rare cases, almost 90% of them, are located in the base of the tongue and a minority of them is located anteriorly near the hyoid bone area. Below we report the case of a young patient with an intracardiac mass first diagnosed with three‐dimensional echocardiography and afterward successfully treated surgically. Once a careful histological examination has revealed a follicular adenoma, the prognosis is good especially if successful surgical excision is part of the management.