Abstract
In 12 cases of well differentiated thyroid carcinoma infiltrating into the larynx and trachea, one total laryngectomy and 11 partial resections of the thyroid were performed. Anterior cervical tumor was the most common compliant. The half of the cases had symptoms such as dyspnea and hoarseness indicating infiltration into the larynx, trachea and recurrent nerve. CT scan and tracheal endoscopy were useful for cases in which the tumor invaded the tracheal mucosa, but for the other cases it was difficult to diagnose the tracheal invasion before operation. In the one case undergone laryngectomy, 3 circular resection and 8 luminar resection, the tumor was found to invade the mucosa in 3, circular ligamentum in 3, and external ligamentum in 3. Other 3 cases had no pathological invasion. Their prognoses are favorable that all the patients are still alive with no local recurrence. Resection of the thyroid carcinoma with the larynx and the trachea are considered to be useful to control the local area.
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