Gastroenterology Book

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Occult Gastrointestinal Bleeding Causes

Aka: Occult Gastrointestinal Bleeding Causes, Gastrointestinal Occult Bleeding Causes
  1. See Also
    1. Gastrointestinal Occult Bleeding
    2. Gastrointestinal Bleeding
    3. Fecal Occult Blood
  2. Causes: False Positive
    1. See Fecal Occult Blood
  3. Causes: Bleeding in the Upper Gastrointestinal Tract
    1. See Upper Gastrointestinal Bleeding
    2. Erosive Gastritis or sastric ulcer
    3. Gastric Carcinoma or Esophageal Cancer
    4. Esophageal Varices
    5. Gastroesophageal Reflux
    6. Hiatal Hernia (with Cameron's Erosions)
    7. Gastric vascular malformation
      1. Dieulafoy's Lesion (dilated vessel in mucosal lesion)
      2. Antral vascular ectasia (Watermelon Stomach)
  4. Causes: Bleeding from the Small Intestine
    1. See Small Intestinal Bleeding
    2. Duodenal Ulcer or Duodenitis
    3. Meckel's Diverticulum
    4. Crohn's Disease (especially terminal ileum)
    5. Gluten Enteropathy
  5. Causes: Bleeding in the Lower Gastrointestinal Tract
    1. See Lower Gastrointestinal Bleeding
    2. Intestinal Polyps (>1 cm)
    3. Diverticular Bleeding
    4. Ischemic colitis
    5. Ulcerative Colitis
    6. Colon Cancer (See below)
  6. Causes: Bleeding from a rectal source
    1. Anal Fissure
    2. Internal Hemorrhoid
  7. Causes: Miscellaneous Source
    1. Infection
      1. Amebiasis
      2. Ascariasis
      3. Cytomegalovirus
      4. Hookworm
      5. Strongyloides
      6. Tuberculosis
      7. Whipworm
    2. Malignancy
      1. Colon Cancer
      2. Kaposi's Sarcoma
      3. Lymphoma
      4. Leiomyoma
      5. Carcinoid
      6. Melanoma
    3. Vascular
      1. Aortoenteric fistula
      2. Hemangioma
      3. Radiation injury
      4. Vascular ectasia
  8. References
    1. Rockey in Feldman (2002) Sleisenger GI, p. 232-48
    2. Zuckerman (2000) Gastroenterology 118:211-2

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