笔者发现以便血为首发症状的急性白血病M5b误诊为胃出血1例,现报道如下。1病历摘要男,19岁,主因腹痛、黑便10 d,发热3 d,以上消化道出血于2009-01-21入院。患者发病时以腹痛、食欲不振为主要症状,无反酸、嗳气,当地医院以胃炎治疗无效,后出现排黑色稀便,面色苍白,全身无力,间断 I found that the first symptom of blood to acute myeloid leukemia M5b misdiagnosed as gastric bleeding in 1 case, are reported below. A medical summary male, 19 years old, the main abdominal pain, black stool 10 d, fever 3 d, more than gastrointestinal bleeding in 2009-01-21 admission. Patients with abdominal pain, loss of appetite as the main symptoms, no acid reflux, belching, local hospital treatment of gastritis invalid, after the row of black loose stools, pale, weakness, intermittent