KL-6 mucin expression in carcinoma of the ampulla of Vater: Association with cancer progression

Table 1 Relationship between KL-6 expression and clinicopathological parameters in patients with carcinoma of the ampulla of Vater

Parameters	n	Positive KL-6 expression (n = 26; %)	P
Age (yr)
≥65	24	14 (58.3)
<65	14	12 (85.7)	0.08
Sex
Male	22	16 (72.7)
Female	16	10 (62.5)	0.503
Histological grade
Well differentiated	31	22 (71.0)
Moderately differentiated	4	3 (75.0)
Poorly differentiated	3	1 (33.3)	0.39
Lymphatic vessel invasion
Present	23	18 (78.3)
Absent	15	8 (53.3)	0.106
Lymph node metastasis
Present	23	19 (82.6)
Absent	15	7 (46.7)	0.02
Venous invasion
Present	17	14 (82.4)
Absent	21	12 (57.1)	0.096
Pancreatic invasion
Present	26	21 (80.8)
Absent	12	5 (41.7)	0.016
Duodenal invasion
Present	30	23 (76.7)
Absent	8	3 (37.5)	0.034
TNM clinical classification
III+IV	18	16 (88.9)
I+II	20	10 (50.0)	0.010