Chapter 084. Head and Neck Cancer (Part 3)

Table 84-1 TNM Classification for Head and Neck Cancer (Except Nasopharyngeal)Primary Tumor SiteT GradeOropharynxHypopharynxT10–2 cm0–2 cmT22.1–4 cm1 site, 2–4 cmT34 cm4 cmT4aLarynx, muscle of tongue,Thyroid/cricoid cartilage,medial pterygoid, hard palate, hyoid mandible invasionbone,thyroid orgland, centralesophagus,compartment soft tissue invasionT4bLateral pterygoid muscle, pterygoid plates,Invasion of prevertebrallateral fascia, encases carotid artery, ornasopharynx, or skull base or involves mediastinal structures encases carotid artery invasionRegional Lymph Nodes (N)NXRegional lymph nodes cannot be assessedN0No regional lymph node metastasisN1Unilateral metastasis in lymph node(s), ≤6 cm in greatest dimension, above the supraclavicular fossaN2 ...
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Chapter 084. Head and Neck Cancer (Part 3) Chapter 084. Head and Neck Cancer (Part 3) Table 84-1 TNM Classification for Head and Neck Cancer (ExceptNasopharyngeal) Primary Tumor Site T Oropharynx HypopharynxGrade T1 0–2 cm 0–2 cm T2 2.1–4 cm >1 site, 2–4 cm T3 >4 cm >4 cm T4a Larynx, muscle of tongue, Thyroid/cricoid cartilage, medial pterygoid, hard palate, hyoid bone, thyroid gland, mandible invasion esophagus, or central compartment soft tissue invasionT4b Lateral pterygoid muscle, Invasion of prevertebral pterygoid plates, lateral fascia, encases carotid artery, or nasopharynx, or skull base or involves mediastinal structures encases carotid artery invasionRegional Lymph Nodes (N)NX Regional lymph nodes cannot be assessedN0 No regional lymph node metastasisN1 Unilateral metastasis in lymph node(s), ≤6 cm in greatest dimension, above the supraclavicular fossaN2 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 M0 No distant metastasis M1 Distant metastasis Stage Grouping Stage Tis N0 M00 Stage T1 N0 M0I Stage T2 N0 M0II Stage T3 N0 M0III T1 N1 M0 T2 N1 M0 T3 N1 M0 Stage T4a N0 M0IVA T4a N1 M0 T1 N2 M0 T2 N2 M0 T3 N2 M0 T4a N2 M0 Stage T4b Any N M0IVB Any T N3 M0 Stage Any T Any N M1IVC