Other antigens in haematologic malignancies and in solid tumours were also well studied in vitro or in vivo, such as CD138 in MM [43], natural killer group 2 member D (NKG2D) in leukaemia and carcinoembryonic antigen (CEA) in colorectal cancer (Tables 2 and 3) [44]. The gene discussed is CEACAM5; the disease is colorectal cancer.