Fig. 9

Clinical diagnoses for 23 individuals, performed using both CTC detection with the antibody-immobilized N50/P50 and pathological analysis of biopsies from colonoscopies. The number in each individual marked positive expression (red colour) of colorectal cancer represents the CTC counts on the fibrous mat-based assay. G1 and G4 represent Grade 1 and Grade 4 that means the cancer looks much like normal colorectal tissue and very abnormal, respectively. G2 and G3 represent Grades 2 and 3 that fall somewhere in between