Clinical features, diagnosis, treatment and prognosis of multiple primary colorectal carcinoma

Table 2 Location, types, and survival rate in two groups

	MC			SC
	Index cancer	2nd cancer	3rd cancer
No. of tumors	22	22	5	30
Location
Right colon	9 (41%)	7 (32%)	2 (40%)	7 (23%)
Left colon	7 (32%)	8 (36%)	2 (40%)	15 (50%)
Rectum	6 (27%)	7 (32%)	1 (20%)	8 (27%)
P value		> 0.1	> 0.1	> 0.1
Types
AC	20 (91%)	19 (86%)	3 (60%)	18 (64%)
Mucoid AC	2 (9)	1 (5)		7 (25)
Canceration		1 (5%)	2 (40%)	3 (11%)
(Adenoma/Polypus)
Ring cell C		1 (5)
P value		> 0.1	< 0.01	> 0.05
Survival Rate
5-yr	71% (15/21)	39% (7/18)		73% (8/11)
10-yr	53% (10/19)	19% (3/16)		63% (5/8)
P value				> 0.1

A: Adenoid; C: Carcinoma. All statistical comparisons were with index cancer of MC by independent t-test or χ²-test.