(a) Schematic of Cell Tracks CTC separation system and (b) Detection of CTC. a. Epithelial cells are isolated from peripheral blood using antibodies to Ep-CAM conjugated to magnetic particles. Cells are then analyzed to determine the number of CTC. b. Detection of CTC. Two intact CTC are shown in the left panel, 33 damaged CTC in the central panel, and 6 cellular fragments in the right panel.