Fig. 2From: Prognostic impact of circulating tumor cell apoptosis and clusters in serial blood samples from patients with metastatic breast cancer in a prospective observational cohortPhotos of CTC morphology from CellTracks II Analyzer (10x). The four different columns depict from left to right: Nuclear DAPI staining (purple)/cytokeratin (CK)-PE (green) overlay, CK-staining, nuclear DAPI staining and CD45-APC staining. Scale bars have been added manually in each frame. a Examples of apoptotic CTCs from four different patients with characteristic fragmented and condensed apoptotic cell nuclei. b Examples of CTC clusters (defined as ≥3 nuclei). c Examples of WBC-CTCsBack to article page