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This fact sheet contains general information about Juvenile Polyposis syndrome (JPS). Each person should see a genetic service for further information and advice.

Key Points

  • People with JPS have an increased chance of developing multiple polyps in the bowel and stomach. If these are left untreated, bowel (colorectal) or stomach cancer can develop.
  • People with JPS due to a faulty SMAD4 gene may also have a condition known as Hereditary Haemorrhagic Telangiectasia (HHT).
  • Family members (including children) 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. While eviQ endeavours to link to reliable sources that provide accurate information, eviQ and the Cancer Institute NSW do not endorse or accept responsibility for the accuracy, currency, reliability or correctness of the content of linked external information sources. Use of this document is subject to eviQ's disclaimer available at  

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29 Feb 2024