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ABO blood type has been associated with various malignancies, including pancreatic cancer. Our aim was to study this association using data from a hospital-based tumour registry.
From the tumour registry, we retrieved data from 15,359 cancer patients treated during 2000-2003 at the European Institute of Oncology (Milan, Italy), with defined ABO blood type. We performed a case-control analysis, comparing the distribution of ABO blood types of patients with each specific form of cancer against that of patients with other forms of cancer. We also reviewed the literature and performed a meta-analysis on the association between ABO blood group and pancreatic cancer.
We observed a significantly lower frequency of blood type O in patients with exocrine pancreatic cancer compared to patients with other forms of cancer (29% versus 44%; P<0.001; odds ratio (OR), 0.53; 95% confidence intervals (CI), 0.33-0.83). This association was confirmed by the meta-analysis of seven prior studies (summary relative risk, 0.79; 95% CI, 0.70-0.90). No association was found for endocrine pancreatic cancer or for cancer originating in other organs.
Our data suggest that the association between ABO blood group and cancer is limited to exocrine pancreas malignancy.
Division of Epidemiology and Biostatistics, European Institute of Oncology, Milan, Italy.
This article was published in the following journal.
Name: European journal of cancer (Oxford, England : 1990)
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A blood group related to the ABO, Lewis and I systems. At least five different erythrocyte antigens are possible, some very rare, others almost universal. Multiple alleles are involved in this blood group.
A group of dominantly and independently inherited antigens associated with the ABO blood factors. They are glycolipids present in plasma and secretions that may adhere to the erythrocytes. The phenotype Le(b) is the result of the interaction of the Le gene Le(a) with the genes for the ABO blood groups.
Erythrocyte isoantigens of the Rh (Rhesus) blood group system, the most complex of all human blood groups. The major antigen Rh or D is the most common cause of erythroblastosis fetalis.
A blood group related both to the ABO and P systems that includes several different antigens found in most people on erythrocytes, in milk, and in saliva. The antibodies react only at low temperatures.
A cancer registry mandated under the National Cancer Act of 1971 to operate and maintain a population-based cancer reporting system, reporting periodically estimates of cancer incidence and mortality in the United States. The Surveillance, Epidemiology, and End Results (SEER) Program is a continuing project of the National Cancer Institute of the National Institutes of Health. Among its goals, in addition to assembling and reporting cancer statistics, are the monitoring of annual cancer incident trends and the promoting of studies designed to identify factors amenable to cancer control interventions. (From National Cancer Institute, NIH Publication No. 91-3074, October 1990)
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