From: Epidermal growth factor receptor gene copy number in 101 advanced colorectal cancer patients treated with chemotherapy plus cetuximab
Patterns FISH
Patients
%
Increased EGFR gene copy number in >50% of cells
56/101
56
EGFR gene copy number
<40% of cells
28/101
28
EGFR gene amplification
4
Not evaluable
13
12