1临床资料1·1一般资料:本组20例曾在基层医院长时间误诊,其中,男12例,女8例,年龄为8~15个月,误诊时间为4~12个月。全部病例均表现为贫血为突出症状,血色素2~5 g/L,一般情况可,智力无明显落后,无先天畸形,无发热、出血、气喘,肝脾淋巴结未触及肿大,染色体检查正常,血常规表现为 1 Clinical data 1.1 General Information: The group of 20 patients had long been misdiagnosed in primary hospitals, including 12 males and 8 females, aged 8 to 15 months, misdiagnosis time was 4 to 12 months. All cases showed anemia as a prominent symptom, hemoglobin 2 ~ 5 g / L, the general situation may be, no obvious mental retardation, no congenital malformations, no fever, bleeding, asthma, liver and spleen lymph nodes did not touch the enlargement, normal chromosome examination, Blood performance is