From: Topoisomerase I copy number alterations as biomarker for irinotecan efficacy in metastatic colorectal cancer
TOP1 CN No (%)
TOP1/CEN-2 ratio No (%)
TOP1/CEN-20 ratio No (%)
<2
7 (6)
50 (46)
98 (91)
2.0 – 2.99
23 (21)
36 (33)
10 (9)
3.0 – 3.99
14 (13)
18 (17)
-
4.0 – 4.99
25 (23)
3 (3)
5.0 – 5.99
15 (14)
6.0 – 6.99
13 (12)
1 (1)
>7
11 (10)