A recent study published in JAMA Oncology by Dr. Vasily Giannakeas, Dr. David W. Lim, and Dr. Steven A. Narod delved into the long-term outcomes of various surgical treatments for unilateral breast cancer. The study, one of the largest of its kind, followed 661,270 women for up to 20 years, analyzing the effects of lumpectomy, unilateral mastectomy, and bilateral mastectomy on breast cancer mortality.