患者男,34岁。因乏力、头晕、面色苍白4个月,当地医院诊为贫血用叶酸、维生素B_12治疗3个月无效,于1990年5月诊断为原发性获得性纯红细胞再生障碍性贫血(PRCA)收入我院。患者发病前无发热及上呼吸道感染等病史,家系中亦无遗传性疾病史。查体:体温37℃,脉搏84次/分,呼吸19次/分,血压 Patient male, 34 years old. Due to weakness, dizziness, pale 4 months, the local hospital diagnosed with anemia with folic acid, vitamin B_12 treatment for 3 months is invalid, in May 1990 diagnosed as primary acquired pure red cell aplasia (PRCA) income I hospital. Before the onset of fever and upper respiratory tract infection and other medical history, family history of no genetic disease. Physical examination: body temperature 37 ℃, pulse 84 beats / min, breathing 19 beats / min, blood pressure