Treatment of Iron-Deficiency Anemia with Left Colonic Angiodysplasia

Introduction to Treatment Approach

The American Gastroenterological Association recommends combining endoscopic ablation therapy for angiodysplasia with iron supplementation, starting with oral iron and switching to intravenous iron if the response is inadequate 1

The American Gastroenterological Association suggests starting with oral iron sulfate 200 mg once daily, which represents the first-line therapy due to its efficacy and low cost 1, 2
Adding vitamin C (ascorbic acid) 500 mg with each iron dose improves absorption, particularly in cases of suboptimal response 1, 3
Continuing oral therapy for 3 months after anemia correction to fully replenish iron stores is recommended by the American Gastroenterological Association 1, 3
Hemoglobin should increase by approximately 2 g/dL after 3-4 weeks of treatment, according to the American Gastroenterological Association 3

The American Society for Gastrointestinal Endoscopy recommends treating colonic angiodysplasia with endoscopic ablation therapy, preferably using argon plasma coagulation or hemostatic clips 1, 4
Argon plasma coagulation is the most commonly used ablation therapy for gastrointestinal angiodysplasia, as stated by the American Society for Gastrointestinal Endoscopy 4
Hemostatic clips and endoscopic sclerosants can be used with evidence of efficacy, according to the American Society for Gastrointestinal Endoscopy 4
The American Society for Gastrointestinal Endoscopy emphasizes that endoscopic treatment of angiodysplasia should always be accompanied by iron supplementation 1, 2

The European Society for Gastrointestinal Endoscopy recommends excluding other sources of gastrointestinal bleeding, as dual pathology (lesions in both the upper and lower GI tract) occurs in 10-15% of patients 5, 6
Considering screening for celiac disease with anti-endomysial antibodies and IgA measurement is recommended by the European Society for Gastrointestinal Endoscopy, as 2-3% of patients with iron-deficiency anemia have celiac disease 5, 6

The American Gastroenterological Association suggests monitoring hemoglobin and erythrocyte indices every 3 months for the first year after correction, then again after another year 3
If no improvement is observed after 4 weeks, evaluating non-adherence, malabsorption, or ongoing blood loss is recommended by the American Gastroenterological Association 3
If anemia does not resolve within 6 months despite appropriate therapy, re-evaluating for ongoing blood loss and considering further gastrointestinal investigations is recommended by the American Gastroenterological Association 3