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Page 4 of 13 Salas et al. J Cancer Metastasis Treat 2018;4:15 I http://dx.doi.org/10.20517/2394-4722.2017.66
Table 1. General features
Cases %
Age (years), mean (range) 64.47 (21-89)
Gender
Female 43 55.1
Male 35 44.9
Tobacco
Yes 8 10.3
No 70 89.7
Alcohol
Yes 5 6.4
No 73 93.6
Location
Hard palate 5 6.4
Upper alveolus 73 93.6
cT
T2-T3 22 28.2
T4 54 69.2
cN
cN0 54 69.2
cN-positive 24 30.8
Clinical stage
I 1 1.3
II 14 17.9
III 6 7.7
IV 57 73.1
Histological grade
Poor/moderate differentiation 34 43.6
Well differentiated 44 56.4
Perineural infiltration
No 31 39.7
Yes 21 26.9
Lymphovascular invasion
No 40 51.3
Yes 13 16.7
p16
Negative 38 48.7
Positive 3 3.8
Neck dissection
No 54 69.2
Yes 24 30.8
Time from initial surgery to neck recurrence (months), mean (range) 8.6 (2-29)
pN
N0 9 11.5
N1 3 3.8
N2 15 19.2
N3 1 1.3
NX 50 64.1
Lymph node levels
I 9 11.5
II 4 5.1
I, II 5 6.4
I, III 1 1.3
II, III 1 1.3
I, II, III 1 1.3
II, V, contralateral 1 1.3
I, II, III, contralateral 1 1.3
I, II, III, IV, contralateral 1 1.3
Without registration data 54 69.2
Extracapsular extension 7 29.2
N+ and N- with neck recurrence 33 42.3