Participants will receive pre-test genetic counseling in one of three ways: (1) in person at MD Anderson; (2) by telephone with an MD Anderson Genetic Counselor/study professional; (3) with a local Genetic Counselor in conference with the MD Anderson Genetic Counselor/study professional. After receiving pre-test genetic counseling, participants will be given the opportunity to schedule a submission of a small sample of blood (about 6 tablespoons) for genetic testing for p53. You may have this blood test repeated if there are any problems in the lab. The study doctor will discuss this with you.