CEACAM6 is a glycosylphosphoinosi-tol (GPI)-linked, cell surface protein and a member of the CEA family of proteins. Structurally, this protein has two C2-type Ig domains and a single N-terminal V-type Ig domain and shares close homology with CEACAM1, CEACAM7 and CEACAM8. Function-ally, CEACAM6 has been implicated in cell adhesion, cellular invasiveness, resistance to anoikis and metastatic behaviour of tumour cells, which are properties investigators have previously tried to exploit using various CEACAM6-targeted therapy approaches.