Table 2.

Clinical and demographical details of patient cohort

		No. of patients§	Percent %
sex	female	44	47.6
	male	40	42.4
pT*	1	13	15.5
	2	15	17.9
	3	12	14.3
	4	30	35.7
	n.a.¶	14	16.7
pN†	0	56	66.7
	1	8	9.5
	2	6	7.1
	n.a.	14	16.7
cM‡	0	65	77.4
	1	3	3.6
	n.a.	16	19
resection margins	negative	37	44
	positive	37	42.9
	n.a.	10	11.9
perineural invasion	negative	18	21.4
	positive	42	50
	n.a.	24	28.6
histologic growth pattern	solid	17	20.2
	tubular	31	36.9
	cribriform	20	23.8
	mixed	16	19

^*: pathological tumor classification

^†: pathological nodal classification

^‡: clinical classification of distant metastases

^§: total number of patients

^¶: not available.