Division of School Facilities - ABOUT DSF Although rare, men can also be diagnosed with the disease. The lifetime risk of getting breast cancer in the U.S. is about 1 in 8 and 1 in 1000 for men. Most breast cancers are found in women over 50 years of age but it also affects younger women. About 10% of breast cancer in the U.S. are found in women younger than 45 years old.