Читать книгу The Esophagus - Группа авторов - Страница 162

The most common benign lesions of the base of the tongue are retention cysts [43]. Granular cell tumors as well as ectopic thyroid tissue and thyroglossal duct cysts also occur at the tongue base. The most common benign tumor‐like lesions of the aryepiglottic folds are retention cysts and saccular cysts [43]. Retention cysts are lined by squamous epithelium and are filled with desquamated debris. Saccular cysts are filled with mucus from glands of the appendix of the laryngeal ventricle [40] and are the mucus‐filled variant of internal laryngoceles. True soft tissue tumors are uncommon and include lipomas, neurofibromas, hamartomas, and oncocytomas, usually arising from the aryepiglottic folds or the mucosa overlying the muscular process of the arytenoid cartilages [40]. Benign tumors arising from the mucoserous minor salivary glands are usually found in the soft palate or tongue base. Chondromas usually arise from the posterior lamina of the cricoid cartilage. Regardless of the specific histologic findings, benign pharyngeal tumors often appear on barium studies as smooth‐surfaced hemispheric masses that protrude into the pharyngeal lumen [52] (Figure 6.25).