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This fact sheet contains general information about Familial Adenomatous Polyposis (FAP). Each person should be referred to a genetic service for further information and advice.

Key Points

  • People with FAP develop a large number of polyps (adenomas) in the bowel. If left untreated, bowel (colorectal) cancer will develop.
  • People with FAP have a slightly increased chance of developing cancer of the small intestine (duodenum).
  • People with FAP have an increased chance of developing benign (non-cancerous) tumours called desmoids.
  • Family members (including pre-teens) can be referred to a genetic service where experts can provide information, advice and support about their chance of developing cancer and the option of genetic testing.

This cancer genetics fact sheet is a guide only and cannot cover every possible situation. The information provided is not intended to replace discussion with a health professional, and should not be interpreted as medical advice. Use of this document is subject to eviQ's disclaimer available at  

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14 Jul 2020