Use of Holmium:Yag laser in early stage oropharyngeal squamous cell cancer

Table 1 Oropharyngeal squamous cell carcinoma staging

Tx	Primary tumour could not be assessed; information unknown
T0	No evidence of primary tumour
Tis	Carcinoma in situ
T1	Tumour less than 2 cm
T2	Tumour between 2 and 4 cm
T3	Tumour larger than 4 cm (or affecting epiglottis)
T4	(1) Moderately advanced local disease growing into local structures (larynx, tongue, palate, medial pterygoid)
	(2) Advanced local disease, affecting internal carotid, lateral pterygoid, nasopharynx
Nx	Lymph nodes cannot be assed or information unknown
N0	No lymph nodes affected
N1 N2	One ipsilateral lymph node, less than 3 cm
	(1) One ipsilateral lymph node between 3 and 6 cm
	(2) Two or more ipsilateral lymph nodes, less than 6 cm
	(3) Contralateral lymph nodes, less than 6 cm
N3	Any lymph node greater than 6 cm
M0	No distant spread
M1	Distant site affected