SMAD4
Associated conditions:
- Colorectal cancer
- Gastric cancer
- Pancreatic cancer
SMAD4 is a central relay in the TGF-beta signaling pathway that controls cell growth and blood-vessel formation. Genetic changes in this gene are associated with an autosomal dominant combined syndrome of juvenile intestinal polyps, which can turn cancerous, and hereditary haemorrhagic telangiectasia with abnormal blood vessels. Knowing your genetic status enables regular bowel and vascular surveillance that greatly reduces harm.
Conditions linked to SMAD4
Colorectal cancer
Colorectal cancer develops in the colon or rectum, usually from polyps that turn cancerous over years. An inherited predisposition raises lifetime risk and shifts it earlier, so it is highly preventable with earlier, more frequent colonoscopy that finds and removes polyps before they progress.
Gastric cancer
Gastric (stomach) cancer forms in the lining of the stomach. Some inherited variants raise its risk, occasionally as a hard-to-detect diffuse type, so carriers may be offered specialist endoscopic surveillance or, in high-risk syndromes, preventive options.
Pancreatic cancer
Pancreatic cancer arises in the pancreas and is often found late. Some inherited variants raise its risk, so carriers may be offered specialist surveillance (MRI or endoscopic ultrasound), which aims to catch changes at a more treatable stage.
