Table 2.

Clinical characteristics of colorectal cancer patients

Patient	Age (years)	Sex	Tumor location	Type	Depth	LN metastasis	Stage
1	77	M	Sigmoid colon	Well	ss	–	II
2	72	F	Descending colon	Well	ss	–	II
3	49	F	Rectum	Mod	ss	–	II
4	76	F	Rectum	Mod	ss	–	II
5	76	M	Rectum	Well	ss	–	II
6	70	F	Rectum	Mod	ss	–	II
7	84	M	Ascending colon	Mod	ss	–	II
8	72	F	Cecum	Mod	ss	–	II
9	77	M	Sigmoid colon	Mod	ss	–	II
10	79	M	Transverse colon	Mod	ss	–	II
11	85	F	Sigmoid colon	Mod	ss	–	II
12	73	F	Cecum	Mod	ss	–	II
13	80	F	Ascending colon	Muc	si	+	IIIa
14	67	M	Ascending colon	Mod	ss	+	IIIa
15	63	F	Rectum	Mod	ss	+	IIIa
16	68	M	Rectum	Mod	ss	+	IIIa
17	80	F	Cecum	Well	ss	+	IIIa
18	62	F	Sigmoid colon	Mod	ss	+	IIIa
19	45	M	Rectum	Mod	ss	+	IIIa
20	49	M	Rectum	Mod	a2	+	IIIb
21	48	M	Rectum	Mod	a2	+	IIIb
22	73	F	Rectum	Mod	a2	+	IIIb
23	67	F	Rectum	Mod	ss	+	IIIb
24	81	M	Rectum	Mod	a2	+	IIIb
25	65	F	Cecum	Poor	mp	+	IIIb
26	76	F	Rectum	Mod	ai	+	IIIb

+, positive of lymph node metastasis; –, negative of lymph node metastastis; a2, cancer exceeds the muscular layer and invades more deeply, but does not invade to other organs; ai, a rectal cancer invades directly to the other organs; M, male; F, female; Mod, moderately‐differentiated adenocarcinoma; Muc, mucinous adenocarcinoma; Poor, poorly‐differentiated adenocarcinoma; si, a colon cancer invades directly to the other organs; ss, subserosa; Well, well‐differentiated adenocarcinoma. Histological type, depth, and stage defined according to the rules of the Japanese Society for Cancer of the Colon and Rectum (6th edn).^{( 19 )}