Hypothyroidism due to ectopy in siblings
M. Kaplan, R. Kauli, U. Raviv, E. Lubin and Z. Laron
Two families each had two siblings with hypothyroidism due to ectopy and
hypoplasia of the thyroid. A genetic factor controlling normal thyroid
development and descent may be responsible, and the importance of plasma
thyroid-stimulating hormone estimation in borderline hypothyroid cases is
emphasized. We suggest screening of siblings of patients with ectopic
thyroid for hypothyroidism.