TNM Classification : Nasopharygeal carcinoma

 

T - Primary Tumor

TX - Primary tumor cannot be assessed

T0 - No evidence of primary tumor

Tis - Carcinoma in situ

 

T1 - Tumor confined to nasopharynx

T2 - Tumor estends to soft tissue of oropharynx and/or nasal fossa

T2a – without parapharyngeal extension

T2b – with parapharyngeal extension

T3 - Tumor invades bony structures and/or paranasal sinuses

T4 - Tumor with intracranial extension and/or involvement of cranial nerves, infratemporal fossa, hypopharynx, or orbit

 

N - Regional Lymph nodes

NX - Reginal lymph nodes cannot be assessed

N0 - No regional lymph node metastasis

N1 - Unilateral metastasis in lymph node(s), 6cm or less in greatest dimension, above supraclavicular fossa

N2 - Bilateral metastasis in lymph node(s), 6cm or less in greatest dimension, above supraclavicular fossa

N3 - Metastasis in lymph node(s)

        (a) greater than 6cm in dimension

        (b) in the supraclavicular

 

M - Distant Metastasis

MX - Distant metastasis cannot be assessed

M0 - No distant metasissis

M1 - Distant metastasis