Mucinous phenotype and CD10 expression of primary adenocarcinoma of the small intestine

Table 5 Clinicopathological features, microsatellite instability status and KRAS mutation

	MSI		KRAS
	MSI-H(n = 4)	MSI-L/MSS(n = 30)	Mutational type(n = 4)	Wild type(n = 33)
Age (yr)	69.5 ± 12.3	59.6 ± 15.91	53.3 ± 13.2	60.8 ± 16.21
Gender (male/female)	4/0	16/14	1/3	22/11
Gross appearance (polypoid/ulcerated)	1/3	6/24	2/2	9/24
Size (cm)	7.7 ± 1.1a	5.1 ± 2.0a	4.4 ± 1.0	5.5 ± 2.0
Location (duodenum/jejunum/ileum)	0/2/2	7/15/8	1/2/1	9/15/9
Histological subtype (tubular2/poorly/mucinous)	2/0/2	22/6/2	4/0/0	22/8/3
Invasion depth3
T1	0	1	0	1
T2	0	2	0	3
T3	2	13	1	13
T4	2	14	3	15
Lymphatic permeation n (%)	3 (75)	23 (77)	4 (100)	22 (67)
Venous invasion n (%)	1 (25)	9 (30)	1 (25)	10 (30)
Adenomatous component n (%)	0 (0)	1 (3)	0 (0)	2 (6)

¹Age of one patient was unknown;

²"Tubular" contains well or moderately differentiated adenocarcinoma;

³UICC TNM classification is used.

^aP < 0.05 vs control.