Patients with cancers in areas of the body that do not involve the digestive tract often experience side effects that impact their gastrointestinal (GI) system, and treating these conditions may be key to their recovery. GI specialists also assist in diagnosing and staging a breadth of diseases.
https://www.bizjournals.com/phoenix/news/2020/02/03/why-your-cancer-care-team-may-need-a.html