# publisher
Agence du Numérique en Santé(ANS) -2 - 10 Rue d'Oradour-sur-Glane, 75015 Paris

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pT1: Tumor 2 cm or less in greatest dimension

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pT2: Tumor more than 2 cm but not more than 4 cm in greatest dimension

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pT3: Tumor more than 4 cm in greatest dimension - Oropharynx : or extension to lingual surface of epiglottis

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pT4a: Moderately advanced local disease. Lip: Tumor invades through cortical bone, inferior alveolar nerve, floor of mouth, or skin of face, ie, chin or nose - Oral cavity: Tumor invades adjacent structures only (eg, through cortical bone [mandible, maxilla], into deep [extrinsic] muscle of tongue [genioglossus, hyoglossus, palatoglossus, and styloglossus], maxillary sinus, skin of face) - Oropharynx : Tumor invades larynx, deep/extrinsic muscle of tongue, medial pterygoid muscles, hard palate, or mandible

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pT4b: Very advanced local disease. Tumor invades masticator space, pterygoid plates, or skull base, and/or encases internal carotid artery - Oropharynx: Tumor invades lateral pterygoid muscle, pterygoid plates, lateral nasopharynx, or skull base, or encases carotid artery