我们对上消化道出血患者进行内镜检查中发现1例十二指肠球部寄生钩虫,经鉴定证实。现报告如下。患者女,32岁,农妇。因上腹胀痛、呕褐色胃内容物及黑粪5天,于1984年8月12日来本院就诊。患者自幼务农,常感上腹闷胀不适,伴头晕、乏力和失眠。体检:贫血外观,心肺(-),上腹部轻压痛,肝脾未扪及。化验:红细胞280万/mm~3,血红蛋白9.0g％,粪便与呕吐物潜血试验均阳性。多次胃肠钡 We found in the endoscopy of patients with upper gastrointestinal bleeding parasitic hookworm in a case of duodenal bulb, confirmed by the identification. The report is as follows. Female patient, 32 years old, peasant women. Due to abdominal pain, vomit stomach contents and black manure 5 days, August 12, 1984 to our hospital. Patient farming since childhood, often feeling abdominal distension discomfort, with dizziness, fatigue and insomnia. Physical examination: anemia appearance, cardiopulmonary (-), mild tenderness in the abdomen, liver and spleen not palpable. Laboratory: RBC 2.8 million / mm ~ 3, hemoglobin 9.0g%, fecal and vomit occult blood test were positive. Multiple gastrointestinal barium