After reviewing the sources for some of the data presented in our article in the August 2001 issue of Clinical Cancer Research(Z-M. Shao, J. Wu, Z-Z. Shen, M. Nguyen. p53 mutation in plasma DNA and its prognostic value in breast cancer patients. Clin Cancer Res, 7: 2222–2227, 2001), we have concluded that the article should be retracted from the literature.