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lüll Evaluation and treatment of iron deficiency anemia: a gastroenterological perspective Zhu A; Kaneshiro M; Kaunitz JDDig Dis Sci 2010[Mar]; 55 (3): 548-59A substantial volume of the consultations requested of gastroenterologists are directed towards the evaluation of anemia. Since iron deficiency anemia often arises from bleeding gastrointestinal lesions, many of which are malignant, establishment of a firm diagnosis usually obligates an endoscopic evaluation. Although the laboratory tests used to make the diagnosis have not changed in many decades, their interpretation has, and this is possibly due to the availability of extensive testing in key populations. We provide data supporting the use of the serum ferritin as the sole useful measure of iron stores, setting the lower limit at 100 microg/l for some populations in order to increase the sensitivity of the test. Trends of the commonly obtained red cell indices, mean corpuscular volume, and the red cell distribution width can provide valuable diagnostic information. Once the diagnosis is established, upper and lower gastrointestinal endoscopy is usually indicated. Nevertheless, in many cases a gastrointestinal source is not found after routine evaluation. Additional studies, including repeat upper and lower endoscopy and often investigation of the small intestine may thus be required. Although oral iron is inexpensive and usually effective, there are many gastrointestinal conditions that warrant treatment of iron deficiency with intravenous iron.|Adolescent[MESH]|Adult[MESH]|Anemia, Iron-Deficiency/*diagnosis/*drug therapy/etiology[MESH]|Child[MESH]|Child, Preschool[MESH]|Endoscopy, Gastrointestinal[MESH]|Erythrocyte Indices[MESH]|Female[MESH]|Ferritins/blood[MESH]|Gastrointestinal Hemorrhage/complications/*diagnosis[MESH]|Humans[MESH]|Infant[MESH]|Iron/administration & dosage[MESH]|Male[MESH]|Middle Aged[MESH]|Occult Blood[MESH] |