PTPRC and colorectal cancer: The features of most CTCs were CK-/CD45-/DAPI+/CEP8>2 (Figure 1b, 1c, 1d), occurring in 40 of these 44 colorectal cancer patients and accounted for 92.1% (174/189) of the whole CTCs, while 15 were CK+/CD45-/DAPI+/CEP8>2 (Figure 1e) in 15 colorectal cancer patients.