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

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pT1: Tumor size 2 cm or less, limited to thyroid

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pT1a: Tumor 1 cm or less in greatest dimension limited to the thyroid.

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pT1b: Tumor more than 1 cm but not more than 2 cm in greatest dimension, limited to the thyroid

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pT2: Tumor more than 2 cm, but not more than 4 cm, limited to thyroid

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pT3: Tumor more than 4 cm limited to thyroid or any tumor with minimal extrathyroid extension (eg, extension to sternothyroid muscle or perithyroid soft tissues)

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pT4a: Moderately advanced disease. Tumor of any size extending beyond the thyroid capsule to invade subcutaneous soft tissues, larynx, trachea, esophagus or recurrent laryngeal nerve

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pT4b: Very advanced disease. Tumor invades prevertebral fascia or encases carotid artery or mediastinal vessels