Among several glycoproteins of the extracellular matrix such as thrombospondin and fibulin, different members of the mucin protein family (MUC1, MUC5AC and MUC16) were identified, confirming that O-glycan structures recognized by CLEC10A are preferentially attached to mucins in breast cancer cells as previously published [37, 38]. Here, MUC1 is linked to breast cancer.