患者男,18岁,学生。1989年3月27日头昏,便后昏倒,在校医室诊为“上感”,服感昌灵两次,后再次昏倒急诊入院。发病前无腹痛、腹泻,无发热及恶心、呕吐。无特殊嗜好。一年前时常上腹胀痛,偶有腹痛、腹泻,但无黑便史。体检:T 37℃,P 102次/分,R 26次/分,BP11.97/7.98kPa。神清合作,重度贫血貌。全身皮肤未见出血点及紫瘢,无蜘蛛痣。浅表淋巴结未触及, Patient male, 18 years old, student. March 27, 1989 dizziness, then collapsed, in the school medical clinic as a “sense of” service Chang Ling twice, after fainting again emergency admission. Before the onset of abdominal pain, diarrhea, no fever and nausea and vomiting. No special hobbies. A year ago often abdominal pain, occasional abdominal pain, diarrhea, but no history of meconium. Physical examination: T 37 ° C, P 102 beats / min, R 26 beats / min, BP 11.97 / 7.98 kPa. Clear cooperation, severe anemia appearance. No skin blemishes and purple scar, no spider nevus. Superficial lymph nodes not touched,