作者报道了1例具有明显的、完全的21单体活产儿。患儿11岁死亡,是已知的完全的21单体患儿中存活时间最长的1例。患者的父母无血缘史或智力障碍史,患儿为第4胎分娩,第1、3、5胎均在怀孕约三个月时自发流产。另外一个男孩和一个女孩均正常。患儿出生时小头畸形,伴有唇、愕裂,鱼形嘴,眼距宽,双侧内眦赘皮,逆先天愚型样眼裂,耳低位,双侧隐睾,二度 The authors reported 1 patient with a clear, complete 21 live births. The 11-year-old child died and is the longest surviving one of 21 known children. The patient’s parents had no history of blood-related or mental retardation, the child was born in the fourth child, and the first, third and fifth births spontaneously aborted at about three months of pregnancy. The other boy and one girl are normal. Children born with microcephaly, accompanied by lip, stunned, fish-shaped mouth, wide eyes, bilateral epicanthus, inverse idiopathic type of eye crack, low ear, bilateral cryptorchidism, two degrees