The New England journal of medicine
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Randomized Controlled Trial Multicenter Study Comparative Study Clinical Trial
Blood transfusions and prognosis in colorectal cancer.
Blood transfusions may adversely affect the prognosis of patients treated surgically for cancer, although definite proof of this adverse effect has not been reported. ⋯ The use of autologous blood as compared with allogeneic blood for transfusion does not improve the prognosis in patients with colorectal cancer. Regardless of their type, transfusions are associated with poor prognosis, probably because of the circumstances that necessitate them.