The relative infrequency and the perplexities of diagnosis combine to make lesions of the thyroglossal tract an unusually interesting group of pathologic changes. In many instances it is impossible to make an accurate and complete differential diagnosis preoperatively, owing to the close similarity of the lesion to a tumefaction arising in the midline of the neck anteriorly and to the lack of specific evidence to set any one of the lesions apart. Greater familiarity with the characteristics of lesions of the thyroglossal tract should aid in their recognition and treatment.
Adequate reason for the existence of a lesion of the thyroglossal tract is found in a study of the embryology of the thyroid gland. Meyer,1 by his able summary of this subject, and Wenglowski,2 through his masterful study of the development of the thyroid, have greatly clarified a controversial problem. Briefly, it appears from the former confusion that