缺铁是贫血的最常见原因，而且缺铁的病人有胃肠失血的可能。疑诊有胃肠失血时，若能确定症状是在上部抑或下部将会便于对疾病的评估检查。为了确定缺铁性贫血病人是否存在胃肠损害及其原因，本文作者对没有全身性和胃肠道症状或体征的缺铁性贫血病人的胃肠道进行了预期评估。 Iron deficiency is the most common cause of anemia, and iron deficiency patients have the possibility of gastrointestinal bleeding. Suspected gastrointestinal bleeding, if you can determine the symptoms in the upper or lower will facilitate the assessment of the disease examination. To determine whether and why gastrointestinal damage exists in patients with iron deficiency anemia, the authors evaluated the gastrointestinal tract in patients with iron-deficiency anemia without systemic and gastrointestinal symptoms or signs.