Due to the high sequence homology between MUC18 with cell adhesion molecules (CAMs), this melanoma antigen was given an official name, melanoma CAM (MCAM).1 With an increasing number of discoveries about MCAM by various research groups, more alias names were given to this protein, including P1H12, MUC18, A32 antigen, S-Endo-1, Mel-CAM, MET-CAM, HEMCAM, or CD146.1–3. The gene discussed is MCAM; the disease is melanoma.