Common cancers in the digestive tract occur in the colon, stomach, pancreas, and liver. Treatment of gastrointestinal cancers requires multidisciplinary care from gastroenterologists, oncologists, and surgeons.
You can also read more about these problems by clicking the following links.
https://www.uptodate.com/contents/colon-and-rectal-cancer-beyond-the-basics
https://www.uptodate.com/contents/screening-for-colorectal-cancer-beyond-the-basics
https://www.esmo.org/content/download/15729/270768/1/ESMO-ACF-EN-Colorectal-Cancer-Guide-for-Patients.pdf
https://www.uptodate.com/contents/colon-polyps-beyond-the-basics
https://www.cancer.gov/types/stomach/patient/stomach-screening-pdq
https://www.esmo.org/content/download/6635/115239/file/ESMO-ACF-Stomach-Cancer-Guide-for-Patients.pdf
https://www.esmo.org/content/download/6609/115065/1/EN-Oesophageal-Cancer-Guide-for-Patients.pdf
https://www.esmo.org/content/download/6625/115171/1/EN-Pancreatic-Cancer-Guide-for-Patients.pdf
https://www.uptodate.com/contents/pancreatic-cancer-beyond-the-basics