TABLE 2.

Pathological features and recurrence patterns according to perineural invasion

Variable	No perineural invasion	Perineural invasion	p‐value
	(n = 291)	(n = 25)
Depth of invasion (T stage)			< 0.001
1	214 (72.6%)	2 (8.0%)
2	32 (12.0%)	1 (4.0%)
3	43 (14.8%)	21 (84.0%)
4	2 (0.6%)	1 (4.0%)
Nodal metastases			0.001
Absent	187 (64.2%)	7 (28%)
Present	104 (35.8%)	18 (72%)
Tumor differentiation			0.342
Well differentiated (G1)	42 (14.4%)	1 (4%)
Moderately differentiated (G2)	163 (56.1%)	16 (64%)
Poorly differentiated (G3)	86 (29.5%)	8 (32%)

Note: Data are shown as n (%).