ery and within the submucosa of the pharyngeal tonsil are a normal finding. The tubal tonsils are poorly defined condensations of lymphoid tissue located around the auditory tube in the nasopharynx and around the fossa of Rosenm├╝ller. The term lingual tonsil refers to the abundant non-encapsulated lymphoid tissue in the adult posterior tongue. The crypts do not appear until birth, are shallow and much less branched than in the palatine tonsil. The surface is covered by non-keratinising squamous epithelium. Adipose tissue and skeletal muscle fibres at the base of the lingual tonsil, and mucous salivary glands and lymph follicles within the lingual tonsil are integral parts of the tongue. Efferent lymphatic vessels of the posterior tongue drain into the deep cervical lymph nodes, after they pass through the pharyn-geal wall in front of or behind the external carotid artery [41].

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