page_title: Small intestine cancer
section_title: Risk factors
hierarchical_section_title: Small intestine cancer / Risk factors
caption_attribution_description: Endoscopic image of adenocarcinoma of duodenum seen in the post-bulbar duodenum. Photograph released under GFDL on permission of patient
context_page_description: Small intestine cancer is a cancer of the small intestine. It is relatively rare compared to other gastrointestinal malignancies such as gastric cancer and colorectal cancer.
  Small intestine cancer can be subdivided into duodenal cancer and cancer of the jejunum and ileum. Duodenal cancer has more in common with stomach cancer, while cancer of the jejunum and ileum have more in common with colorectal cancer. Five-year survival rates are 65%.
context_section_description: Risk factors for small intestine cancer include:
  Crohn's disease
  Celiac disease
  Radiation exposure
  Hereditary gastrointestinal cancer syndromes: familial adenomatous polyposis, hereditary nonpolyposis colorectal cancer, Peutz–Jeghers syndrome
  Males are 25% more likely to develop the disease
  Benign tumours and conditions that may be mistaken for cancer of the small bowel:
  Hamartoma
  Tuberculosis
caption: Endoscopic image of adenocarcinoma of duodenum seen in the post-bulbar duodenum.
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