染色体部分三体的儿童往往伴有智力迟钝和其它表型异常。本文报道的一例部分三体的女性息儿也是如此。患者的智力低下,面型异常。根据家系研究,发现她的祖母和小弟是平衡易位杂合体,从而知道她是平衡易位的不平衡分离产物。据我们已查阅的资料,同样的病例国内外尚未见有报告。 Chromosome part trisomy children are often accompanied by mental retardation and other phenotypic abnormalities. This article also reports a case of part-trisomy female infants as well. Patients with mental retardation, abnormal face. According to pedigree studies, her grandmother and her brother were found to be balanced translocations and thus to know that she was an unbalanced product of equilibrium translocation. According to the information we have reviewed, the same cases have not been reported at home and abroad.