[Congenital thyroid abnormality (subhyoid ectopy) associated with mitral valve prolapse].

By echocardiographic technique the Authors have studied a rare congenital anomaly: "sub-hyoid ectopy of the thyroid gland". The patient, a 35 years unmarried woman, with manifest clinic symptoms of hypothyroidism, was affected with mesotelesystolic prolapse of the posterior leaflet of the mitral valve. It has also been possible to put in evidence the findings of mixoedematous cardiopathy and its resolution after thyroid opotherapy.