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  1. Gastrointestinal tract - Mayo Clinic

    Your digestive tract stretches from your mouth to your anus. It includes the organs necessary to digest food, absorb nutrients and process waste.

  2. Gastrointestinal bleeding - Symptoms and causes - Mayo Clinic

    Oct 13, 2023 · Gastrointestinal bleeding can happen either in the upper or lower gastrointestinal tract. Upper GI bleeding Causes of upper GI bleeding can include: Peptic ulcer. This is the …

  3. Upper endoscopy - Mayo Clinic

    Jul 2, 2024 · An upper endoscopy, also called an upper gastrointestinal endoscopy, is a procedure used to visually examine your upper digestive system. This is done with the help of …

  4. Inflammatory bowel disease (IBD) - Symptoms and causes

    Dec 18, 2024 · Gastroenterology & GI Surgery Blog Connect with others and follow the latest advances in treating Crohn's disease and ulcerative colitis on Mayo Clinic Connect. …

  5. Viral gastroenteritis (stomach flu) - Mayo Clinic

    Apr 30, 2025 · Viral gastroenteritis The stomach, small intestine and large intestine (colon) are part of your digestive tract, which processes the foods you eat. Viral gastroenteritis is an …

  6. Crohn's disease - Symptoms and causes - Mayo Clinic

    Dec 4, 2025 · Crohn's disease is an inflammatory bowel disease that causes chronic inflammation of the GI tract, which extends from your stomach all the way down to your anus. Different …

  7. Gastrointestinal stromal tumor (GIST) - Symptoms and causes

    Dec 24, 2025 · Overview A gastrointestinal stromal tumor, also called a GIST, is a type of cancer that begins in the digestive system. GISTs happen most often in the stomach and small …

  8. Endoscopic ultrasound - Mayo Clinic

    Endoscopic ultrasound is a procedure that combines endoscopy and ultrasound to create images of the digestive tract and nearby organs and tissues. It also is called EUS. During EUS, a thin, …

  9. Expanding insights into autoimmune GI dysmotility - Mayo Clinic

    Jul 23, 2022 · Autoimmune gastrointestinal dysmotility (AGID) is a limited form of dysautonomia that affects digestive tract motility. Although rare, the condition can be debilitating, with …

  10. What causes gastrointestinal bleeding and how serious is it really?

    Oct 12, 2020 · Gastrointestinal (GI) bleeding is a symptom of a disorder in your digestive tract. The blood often appears in stool or vomit but isn't always visible, though it may cause the stool …