From: Inter-relationship between microsatellite instability, thymidylate synthase expression, and p53 status in colorectal cancer: implications for chemoresistance
TS status
p53 status
MSI status
MSS
MSI
Total
All tumours
+
221
23
244
-
155
42
197
376
65
441*
TS low level tumours
78
8
86
75
21
96
153
29
182**
TS high level tumours
143
15
158
80
101
223
36
259***