Dr. George Papanicolaou discovered that it was possible to detect cancer by inspecting cervical cells. The Pap smear, the cervical cancer screening test, is named after him.
American Cancer Society/AP
Elizabeth, Samuel, Bryan and Noah Shaw amid Texas bluebonnets on Easter Sunday. Samuel was conceived with in vitro fertilization so he would not suffer from the hereditary cancer that afflicted Noah.
Courtesy of Elizabeth Shaw
Joscelyn Benninghoff, 10, goes over the results of her cholesterol test with her mother Elizabeth Duruz (right) and Dr. Elaine Urbina at Cincinnati Children's Hospital in 2011.
Stacy Riggs of Fairfax, Va., is prepped for a screening for atrial fibrillation by Life Line Screening medical assistant Kennea Blake at Messiah United Methodist Church in Springfield, Va.
Jenny Gold/Kaiser Health News