Abstract.Cancer metastasis is responsible for most of the morbidity and mortality associated with cancer. Cancer metastatic progression is a multiple step process which includes enhanced cell proliferation, release of proteolytic enzymes, cell motility and invasion, angiogenesis and establishment of a supportive microenvironment at the sites of metastatic growth (1, 2).Traditional cancer therapy has focused on removal or destruction of tumour cells by surgery, radiation and rather nonselective types of chemotherapy. Surgery and radiation are often effective with tumours which are localized and have not metastasized to multiple sites throughout the body. Chemotherapy appears to be most effective in the treatment of metastatic cancer; however, typical chemotherapeutic agents such as cisplatin, methotrexate, vincristine, 5-fluorouracil among many others, focus on rapidly growing tissues since cancer cells are relatively rapidly growing. Thus, cancer chemotherapy often results in a high incidence of unwanted and damaging side-effects in rapidly-dividing normal tissues, such as blood cells and cells lining gastrointestinal tract.With a greater understanding of cellular chemistry and genomics during the past twenty years, cellular targets that are unique to cancer cells have been identified and chemotherapeutic agents which specifically bind to, destroy or otherwise inactivate these unique cellular targets have been developed. These agents which impede these unique or overexpressed cancer targets tend to be more selective, -thus more effective with fewer side-effects than traditional, nonselective chemotherapy. They target critical checkpoints which are often overexpressed on rapidly growing and malignant cancer cells, such as vascular endothelial growth factor (VEGF), epidermal growth factor (EGF) and tyrosine kinase. Therefore, cancer Immunotherapy is an exciting and relatively new method to selectively block critical checkpoints in the process of cancer development (3, 4).