title: Cytogenetic Study of Mentally Retarded Children in Taipei.
abstract: 560 blood samples collected from mentally retarded children in Taipei were karyotypically analyzed for the incidence of fragile X and other chromosome abnormalities. The fragile site at Xq27.3 was observed in 18 patients (3.21%), 11 males and 7 females, out of the 560 blood cultures using M medium. Down syndrome (6.25%), 24 males and 11 females, was the other major category of abnormality. Other abnormalities, including inversion, translocation, deletion, duplication, ring as well as an extra marker chromosome were observed. The overall incidence of chromosomal abnormalities in these children was 14.82%. Copyright 1994 S. Karger AG, Basel
authors.affiliation: Institute of Genetics, National Yang-Ming Medical College, National Taiwan University Hospital, Taipei, Taiwan, Republic of China.
authors.forename: S.
authors.initials: S
authors.lastname: Wang-Wuu
authors.forename: Y.-M.
authors.initials: YM
authors.lastname: Lai
authors.forename: W.-L.
authors.initials: WL
authors.lastname: Hwu
authors.forename: T.-R.
authors.initials: TR
authors.lastname: Wang
authors.forename: K.-D.
authors.initials: KD
authors.lastname: Wuu