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Primary adenocarcinoma arising in the sublingual gland is extremely rara, accounting for six cases reported in extensive survey of the literature for the period of 1930 to 1981. A case of adenocarcinoma of the sublingual gland is documented, demonstrating a highly malignant nature of the disease. This neoplasm possesses particular therapeutic problems owing to the relative lack of symptoms and the delay of initial medical observation after the onset of symptoms.

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The localization of the ventricle exactly above the anterior commissure of the vocal cords is important in performing supraglottic laryngectomy. The lateral projections of pre‐operative laryngograms are examined and the following two dimensions are measured on the film: (1) distance between the bottom of the thyroid notch and the inferior border of the thyroid cartilage and (2) distance between the anterior part of the ventricle and the inferior border. The ratio of these two distances is obtained and is designated as distance ratio (DR). The DR is similarly calculated from the actual measurements of the laryngeal specimens and is compared with the DR based on the laryngograms. Differences between these two DR's are nonsignificant (0.5