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Lip and oral Cavity T stage

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awadahmed's version from 2015-09-10 22:55

Section

Question Answer
TXPrimary tumor cannot be assessed
T0 No evidence of primary tumor
T1 <2cm
T2Tumor 2-4cm
T3>4cm
T4aT4a (lip) Tumour invades through cortical bone, inferior alveolar nerve, floor of mouth, or skin (chin or nose) T4a (oral cavity) Tumour invades through cortical bone, into deep/extrinsic muscle of tongue (genioglossus, hyoglossus, palatoglossus, and styloglossus), maxillary sinus, or skin of face
T4bTumour invades masticator space, pterygoid plates, or skull base; or encases internal carotid artery
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NX: Regional lymph nodes cannot be assessed
N0: No regional lymph node metastasis
N1: Metastasis in a single ipsilateral lymph node, 3 cm or less in greatest dimension
N2: Metastasis as specified in N2a, 2b, 2c below
N2a: Metastasis in a single ipsilateral lymph node, more than 3 cm but not more than 6 cm in greatest dimension
N2b: Metastasis in multiple ipsilateral lymph nodes, none more than 6 cm in greatest dimension
N2c: Metastasis in bilateral or contralateral lymph nodes, none more than 6 cm in greatest dimension
N3: Metastasis in a lymph node more than 6 cm in greatest dimension