Figure 1: Fluorescent detection of circulating tumour cells (CTCs) in 5 ml of peripheral blood from a patient with peritoneal carcinomatosis from ceacal cancer. Antikeratin epithelial marker (red) and nuclear marker (blue). A. No CTCs are detected in healthy relative control. B. 25 CTCs detected two days preoperatively by anti-keratin, anti-CD45 and DAPI staining. C. 21 CTCs detected seven days postoperatively with the same staining as B. D. No CTCs detected 30 days postoperatively