胸腺是人体的中枢免疫器官,孕后第六周出现原基,胚胎时期及生后继续发育,至青春期始逐渐呈生理性萎缩。然而,由于种种原因在青春期前,以至婴幼儿期也常常发生胸腺萎缩。本文对212例围产儿尸检的胸腺进行了病理学观察,进而对产生胸腺继发萎缩的各有关因素进行了重点分析。结果如下。 Thymus is the body’s central immune organs, the first six weeks after pregnancy, primordia, embryonic period and postnatal development, gradually began to puberty with physiological atrophy. However, thymus atrophy often occurs before adolescence and as infants and young children for various reasons. In this paper, 212 cases of perinatal autopsy of the thymus were pathologically observed, and then produce the relevant factors of thymic secondary atrophy were analyzed. The result is as follows.