Table 1

Gastrointestinal (GI) diseases presenting with iron deficiency

Occult GI blood loss
   NSAID use
   Colonic cancer/polyp
   Gastric cancer
   Crohn's disease
   Ulcerative colitis
   Peptic ulcer1-151
   Oesophageal cancer
   Water melon stomach
   Intestinal telangiectasia
   Lymphoma, leiomyoma and other small bowel tumours
   Duodenal polyp (Brunner's gland adenoma)
   Carcinoma of the ampulla of Vater
   Meckel's diverticulum
  Coeliac disease
  Gastrectomy (partial and total) and gastric atrophy
  Gut resection or bypass
  Bacterial overgrowth
  Whipple's disease
  • 1-151 Although common causes of acute bleeding they are uncommon causes of occult bleeding.