Men with blood group O are far less likely to suffer a recurrence of cancer after prostate tumour surgery than men with other blood types, researchers report.
A standard treatment for localised prostate cancer is to remove the whole gland, a procedure called radical prostatectomy, but this fails to stop the cancer in nearly a third of patients.
Japanese researchers looked at 555 men who had had radical prostatectomy, examining their case 52 months on average after the operation.
Patients with blood group O were 35 percent less likely to have a recurrence of cancer compared with patients with blood group A, they found.
"This is the first time that anyone has shown that prostate cancer recurrence can vary with blood group," Yoshio Ohno of Tokyo Medical University said in a press release.
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