Figure 1From: Single cell mutational analysis of PIK3CA in circulating tumor cells and metastases in breast cancer reveals heterogeneity, discordance, and mutation persistence in cultured disseminated tumor cells from bone marrow Single cell isolation and identification. Individual tumor cells (TCs) from primary or metastatic tissue, blood, or bone marrow were isolated by the MagSweeper and immunostained (200×). Panel (A) shows examples of CTCs and DTCs (CK+, CD45-, DAPI+); small round circles in two frames of (A) are autofluorescing residual magnetic microbeads; Panel (B) shows an example of TCs from tumor tissue (CK+, CD45-, DAPI+); Panel (C) shows examples of WBCs (CK-/very weak, CD45+, DAPI+). Green = cytokeratin; red = CD45; blue = DAPI nuclear stain.Back to article page