继发性免疫缺陷病比原发性免疫缺陷病更多见。近几年 ,有关报道增多。婴儿获得性免疫缺陷综合征〔1〕,感染与自身免疫病〔2〕都详细阐述了感染与获得性免疫缺陷病的关系和机制 ,但对于严重感染引起小儿胸腺急性萎缩尚未见报道。我院曾发生 1例 ,报告如下。1　病例介绍患儿 ,女 Secondary immunodeficiency disease is more common than primary immunodeficiency disease. In recent years, the reports have increased. Infant acquired immunodeficiency syndrome [1], infection and autoimmune disease [2] are described in detail the relationship between infection and acquired immune deficiency disease and mechanism, but for severe infection caused by acute thymus in children has not been reported. 1 case occurred in our hospital, the report is as follows. 1 case description children, women