Familial thyroid ectopy and hemiagenesis.
Two siblings had sublingual thyroid glands and hypothyroidism. A third sibling had a left lobe agenesis of the thyroid, but normal function of the gland. This is the second such family to be described.
D002675:Child, Preschool; D005260:Female; D006801:Humans; D007037:Hypothyroidism / Q000209:etiology / Q000235:genetics; D008297:Male; D009060:Mouth Floor; D013961:Thyroid Gland / Q000002:abnormalities*