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Fig. 4.6 A Well-differentiated squamous cell carcinoma (SCC), characterized by abundant formation of keratin pearls. B Moderately differentiated SCC. Cells form large anastomosing areas in which keratin pearls are formed. They are not very numerous and the main component consists of cells with pronounced cytonuclear atypia.

importance of close examination of high-risk sites. The oropharynx consists of the base of the tongue (posterior third), vallecula, tonsil with tonsillar fossae and pillars, glossotonsillar sulci, posterior wall and superior wall composed of the inferior surface of the soft palate and the uvula. The most common oropharyngeal site of involvement for SCC is the base of tongue.

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