Figure 4: FGFR2 copy number measured by ddPCR in archival FFPE cancer samples. Copy number of the FGFR2 gene were measured in human colon carcinomas (red dots, n=4), diffuse-type gastric carcinomas (green dots, n=6), intestinal-type gastric carcinomas (blue dots, n=4), and hereditary diffuse gastric cancers (black dots, n=7). Patient 525 is a positive control for the FGFR2 amplification. The X-axis numbers indicate patient identification numbers; “N” indicates a matched normal tissue control for that patient identification number. Error bars represent standard deviation of a minimum of 3 experimental replicates.