Table 1.

Baseline features of the patients

Factor		Number
Gender	Male	51
	Female	26
Age	≥60	51
	<60	26
T stage	T3	57
	≤T2	20
N stage	N0	35
	N1	42
M stage	M0	73
	M1	4
TMN stage	≥II	63
	I	14
Tumor sites	Head/Neck	40
	Body/Tail	37
Nerve invasion	Yes	49
	No	28
Vascular invasion	Yes	10
	No	67
Nuclear grade	III	26
	≤II	51