As reviewed, many mAbs have been approved by the FDA to treat different types of solid tumors and most of them were developed to recognize almost the same tumor targets like HER2, EGFR, VEGF/R, CTL4 and PD1-PD-L1 and less extensively GD2 and RANKL with the purpose to block oncogenic pathways and the formation of new blood vessels, to modulate the immune response against tumor cells and to regulate osteoclast function and deliver cytotoxic drugs to the tumor cells. The gene discussed is SLC44A4; the disease is neoplasm.