Abstract
Malignant tumors arising from laryngeal gland cells are extremely rare. No more than 1% of the epithelial malignancies of the larynx are nonsquamous carcinomas. Moreover, adenoid cystic carcinomas make up fewer than 0.25% of all malignancies of the larynx. In the Japanese literature, only 28 cases have been reported. We have encountered a case of laryngeal (supraglottic) adenoid cystic carcinoma.A 68-year-old woman complained of hoarseness and slight dyspnea of six months' duration. We suspected a thyroid carcinoma and laryngeal tumor. We performed fine needle aspiration for the thyroid mass, and findings suggested papillary carcinoma. Laryngoscopic examination revealed a smooth mass involving the right false vocal cord and epiglottis. The pathology report indicated adenoid cystic carcinoma. The patient underwent total laryngectomy, subtotal thyroidectomy, right neck dissection, and reconstruction with LDMC. We examined the resected specimens histologically by whole organ serial sectioning and discussed the evaluation, treatment, clinical course and prognosis of adenoid cystic carcinoma of the larynx. The overall 10-year survival rate is worse than the overall 5-year survival rate. Therefore, we must observe cases of adenoid cystic carcinoma for over 10 years.
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