Introduction With this booklet, patients have access to infor-mation on the way breast cancer is treated atthe nation’s leading cancer centers. Originallydeveloped for cancer specialists by the NationalComprehensive Cancer network (NCCN), thesetreatment guidelines have now been trans-lated for the public by the American CancerSociety (ACS). Since 1995, doctors have looked to the NCCN for guidance on the highest quality,most effective advice on treating cancer. Formore than 85 years, the public has relied on theAmerican Cancer Society for information aboutcancer. The Society’s books and brochuresprovide comprehensive, current, and under-standable information to hundreds of thou-sands of patients, their families, and friends.This collaboration between the NCCN and ACSprovides an authoritative and understandablesource of cancer treatment information forthe public.