Memorial Sloan Kettering Cancer Center (MSK or MSKCC) is a cancer treatment and research institution founded in 1884 as the New York Cancer Hospital. The main campus is located at 1275 York Avenue, between 67th and 68th Streets, in Manhattan New York City. MSK has long been a leader in cancer surgery, chemotherapy, and radiotherapy and is the world's largest and oldest dedicated cancer hospital. It was the first to develop services specifically dedicated to the psychiatric aspects of cancer, to the relief of cancer pain, and to genetic counseling. As of 2014, U.S.