Abstract
LESIONS of the thyroglossal tract are found in postnatal life because of irregularities in the development and growth of the thyroid gland. Studies of the origin of this gland indicate that two major types of entities may result from such abnormalities: 1. Accessory thyroid tissue may be found anywhere from the base of the tongue to the arch of the aorta. 2. Remnants of pharyngeal mucosa may persist in the normal thyroid or be found anywhere along the path of its growth. From these undestroyed cells of the embryonic pharynx, cysts, fistulae or rarely malignant lesions, may arise (1, 2, 3). Sinuses are usually the result of injudicious surgery or spontaneous rupture of an abscess. Before considering the 55 clinical examples of these problems that are the basis of this report, it is essential to renew our knowledge of the differentiation and growth of tissue that made them possible.
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