Large Intestinal Cancer
Copyright ©The Author(s) 2002.
World J Gastroenterol. Jun 15, 2002; 8(3): 488-492
Published online Jun 15, 2002. doi: 10.3748/wjg.v8.i3.488
Table 1 Age distribution of two groups of high-risk populations with polyps
Age Group1a
2b
Total (%)
Male (%)Female (%)Male (%)Female (%)
30-644 (36.6)440 (41.6)287 (34.4)181 (37.2)1552 (38.1)
40-452 (25.7)270 (25.6)226 (27.1)100 (23.7)1049 (25.8)
50-434 (24.7)237 (22.4)204 (24.4)99 (23.5)974 (23.9)
60-164 (9.3)89 (8.4)99 (11.9)37 (27.2)389 (9.6)
70-64 (3.7)21 (2.0)19 (2.3)5 (1.2)109 (2.7)
Total175810578354224072
Table 2 Pathologic features of initial polyps of two groups of high-risk populations
Pathologic DiagnosisFirst group
Second group
Total
n%n%n%
Adenoma148552.8887669.47236158.02
Tubular135248.1584366.85219553.94
Tublovillous1043.70312.461353.32
Villous190.6820.16210.52
Non-adenomatus132647.2238230.29170841.98
Mucosal59621.23957.5369116.98
Juvenile1836.52957.532786.83
Hyperplastic1134.02725.711854.55
Inflammatory903.2140.32942.31
Schistosomiais32611.611159.1244110.84
Lymphoid100.3610.08110.27
Other80.2800.0080.20
No pathologic diag70.2530.24100.25
Total281512614076
Table 3 Output of following with endoscopy among high-risk population with history of polyps
YearExpected nObserved n (%)Adenoma n (%)Non-adenomatous n (%)Colorectal cancern (1/100000)
1st group
197928032197 (78.38)178 (8.10)104 (4.73)6 (273.10)
198127631592 (57.62)61 (3.83)27 (1.70)4 (251.26)
198327192147 (78.96)108 (5.03)33 (1.54)2 (93.15)
1987*26892408 (89.52)191 (7.93)96 (4.00)4 (166.11)
1993*23881475 (61.77)121 (8.20)52 (3.53)4 (271.19)
1998*22071020 (46.22)95 (9.31)17 (1.67)4 (392.16)
2nd group
19821253461 (36.79)17 (3.69)6 (1.30)0 (0.00)
198412351056 (85.51)49 (4.64)26 (2.46)0 (0.00)
1988*1183931 (78.70)64 (6.87)20 (2.15)0 (0.00)
1994*1097479 (43.66)33 (6.68)17 (3.55)3 (626.30)
1998*1040486 (46.73)36 (7.41)17 (3.50)0 (0.00)
Total14252953 (6.68)417 (2.93)27 (189.45)