The cancer can cause symptoms by either bleeding or causing disruption of the normal bowel function or by affecting organs it may have spread to.
Symptoms include:
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Abdominal Pain
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Blood from the back passage, often mixed in with the stools, but not always
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A loss of appetite
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Non deliberate weight loss
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A change in bowel habit
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A permanent feeling of having to empty the bowel (called tenesmus)
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Faecal incontinence
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Passing mucous from the bottom
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Anaemia (a low amount of red blood in the circulation)
