先天性高铁血红蛋白(Met Hb,下同)血症为一色素代谢缺陷病,临床少见,常易误诊。例1 栾婴,女,33天,双胎儿。因面部及全身皮肤青紫25天,逐渐加重十余天于1982年6月29日入院。患儿系2胎,足月顺产,人工喂养。病前后无发热,咳嗽及腹泻等,亦无用药及不洁饮食史。其母在孕期、产后均无服 Congenital methemoglobin (Met Hb, the same below) blood disease is a pigment metabolism deficiency disease, clinical rare, often misdiagnosed. Example 1 Luan infant, female, 33 days, twins. Due to facial and systemic skin bruising 25 days, gradually increased more than ten days in June 29, 1982 admission. 2 children with children, full-term natural delivery, artificial feeding. Before and after the disease without fever, cough and diarrhea, etc., no medication and unclean diet history. The mother in pregnancy, no postpartum service