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C‐ETACs are heterotypic. Cytospin smears of confirmed C‐ETAC samples were immunostained for CD44 in a known case of Ca buccal mucosa (a–e) and CD8a in a case of Ca Breast (f–j). C‐ETACs in a–d were stained for DAPI, panCK, CD44 and CD45, respectively, while e is the composite overlay. C‐ETACs in f–h were stained for DAPI, EpCAM and CD8a, while i is the bright field image and j is the composite overlay.
