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Lip and Oral Cavity

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awadahmed's version from 2015-09-10 23:04

Section 1

Question Answer
T0 No evidence of primary tumour
Tis Carcinoma in situ
T1 Tumour 2 cm or less in greatest dimension
T2 Tumour more than 2 cm but not more than 4 cm in greatest dimension
T3 Tumour more than 4 cm in greatest dimension
T4a (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
T4b (lip and oral cavity) Tumour invades masticator space, pterygoid plates, or skull base; or encases internal carotid artery
N0No regional lymph node metastasis
N1Metastasis in a single ipsilateral lymph node, 3 cm or less in greatest dimension
N2Metastasis as specified in N2a, 2b, 2c below
N2aMetastasis in a single ipsilateral lymph node, more than 3 cm but not more than 6 cm in greatest dimension
N2bMetastasis in multiple ipsilateral lymph nodes, none more than 6 cm in greatest dimension
N2cMetastasis in bilateral or contralateral lymph nodes, none more than 6 cm in greatest dimension
N3Metastasis in a lymph node more than 6 cm in greatest dimension
Stage 0 Tis N0 M0
Stage 1T1 N0 M0
Stage 2T2 N0 M0
Stage IIIT1, T2 N1 M0
Stage IIIT3 N0, N1 M0
Stage IVA T1, T2, T3 N2 M0
Stage IVA T4a N0, N1, N2 M0
Stage IVBAny T N3 M0
Stage IVBT4b Any N M0
Stage IVCAny T Any N M1
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Section 2