Source:http://linkedlifedata.com/resource/umls/id/C0040124
MSH: A cyst in the neck caused by persistence of portions of, or by lack of closure of, the primitive thyroglossal duct. (Dorland, 27th ed),NCI: A congenital benign cyst arising from the remnants of the thyroglossal duct. It is usually located in the midline of the neck.