Janet Rowley (1925–2013), a physician, was the first person to find the link between genetic abnormalities and certain types of cancers. In the 1970s she discovered specific chromosomal changes in patients with some types of leukemia. Rowley’s research revolutionized the understanding and treatment of cancer, leading to the creation of drugs that can reduce cancer symptoms or cause them to vanish (remission). Cancer research continues to be driven by her insight as to its genetic nature. Rowley was a member of the National Academy of Sciences.