tailieunhanh - Chapter 084. Head and Neck Cancer (Part 3)

Table 84-1 TNM Classification for Head and Neck Cancer (Except Nasopharyngeal) Primary Tumor Site T Grade Oropharynx Hypopharynx T1 0–2 cm 0–2 cm T2 €“4 cm 1 site, 2–4 cm T3 4 cm 4 cm T4a Larynx, muscle of tongue, Thyroid/cricoid cartilage, medial pterygoid, hard palate, hyoid mandible invasion bone, thyroid or gland, central esophagus, compartment soft tissue invasion T4b Lateral pterygoid muscle, pterygoid plates, Invasion of prevertebral lateral fascia, encases carotid artery, or nasopharynx, or skull base or involves mediastinal structures encases carotid artery invasion Regional Lymph Nodes (N) NX Regional lymph nodes cannot be assessed N0 No regional lymph node metastasis N1 Unilateral metastasis in lymph node(s), ≤6 cm in greatest dimension, above the supraclavicular fossa N2 . | Chapter 084. Head and Neck Cancer Part 3 Table 84-1 TNM Classification for Head and Neck Cancer Except Nasopharyngeal Primary Tumor Site T Grade Oropharynx Hypopharynx T1 0â 2 cm 0a 2 cm T2 4 cm 1 site 2a 4 cm T3 4 cm 4 cm T4a Larynx muscle of tongue Thyroid cricoid cartilage medial pterygoid hard palate mandible invasion hyoid bone thyroid gland esophagus or central compartment soft tissue invasion T4b Lateral pterygoid muscle pterygoid plates lateral nasopharynx or skull base or encases carotid artery invasion Invasion of prevertebral fascia encases carotid artery or involves mediastinal structures Regional Lymph Nodes N NX Regional lymph nodes cannot be assessed N0 No regional lymph node metastasis N1 Unilateral metastasis in lymph node s 6 cm in greatest dimension above the supraclavicular fossa N2 Bilateral metastasis in lymph node s 6 cm in greatest dimension above the supraclavicular fossa N3 Metastasis in a lymph node s 6 cm and or to supraclavicular fossa N3a 6 cm N3b Extension to the supraclavicular fossa MX Distant metastasis cannot be assessed MO No distant metastasis Ml Distant metastasis Stage Grouping Stage O Tis NO MO Stage I T1 NO .