Pancreatic cancer is one of the most deadly types of cancer because the pancreas can quickly spread cancer cells all over the body. If people are lucky enough to detect the cancer before it spreads, the cancer can be treated, but unfortunately, symptoms don't usually show up before the cancer starts to spread.
Cancer is not inherited genetically, but there is a genetic component affecting susceptibility when a person inherits hereditary pancreatitis, which is extremely rare. A person does not develop cancer unless they are exposed to a substance that causes cancer.
Genetics also influences the way people react to a cancer-causing substance once a person is exposed, so you could be more susceptible to cancer than most people, but the odds don't change much just because your grandmother had it.
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