Case-Control Study of Genetic and Environmental Risk Factors for Pancreatic Carcinoma

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Pancreatic carcinoma is the fourth most common cause of cancer death in developed countries, and is approximately sixty percent more common in men than in women. In Australia approximately 1800 people are diagnosed with pancreatic cancer each year and there are a similar number of deaths. The five-year survival is less than five percent, and the majority of patients die within the first year. Surgery is frequently not possible due to the advanced stage of disease at diagnosis, and chemotherapy is largely ineffective. A better understanding of the causes of pancreatic cancer is essential in order to develop strategies to prevent this lethal cancer. Currently the causes of pancreatic cancer are poorly understood. Family history and smoking probably account for approximately 30% of cases, but for the remainder the cause is unknown. This study will assess a new hypothesis, namely that too much acid in the stomach possibly caused by infection with a bacterial organism, could increase the risk of pancreatic cancer. We will include people who are diagnosed with cancer of the pancreas (cases), and match these to people selected from the electoral roll who have not ever been diagnosed with pancreatic cancer (controls). Participants will be asked a series of detailed questions about their diet, smoking, occupation and medical history. We will collect blood to look for antibodies to the bacteria and to examine specific genes, and we will compare all these factors in cases and controls. This is one of the first large studies of pancreatic cancer in Australia and we will take an integrated approach to examining interactions between genetics and exposure to environmental factors.