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A familial predisposition is present in
up to 30% of patients with gastrointestinal tumours.
Within these cases a distinction is made between hereditary gastrointestinal cancer and familial clustering
of gastrointestinal cancer. The former group accounts for about 7–10% of all cases of gastrointestinal
cancer. In the latter group the precise genetic causes of the familial predisposition are not yet known. |
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