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A Cytogenetic Survey in an Institution for the Mentally Retarded Satoru Kazukawa 1 , Masaomi Endo 1 , Ariyuki Hori 1 , Tsutomu Fujii 1 , Gyoshun Inao 2 , Tomokazu Shibutani 3 1Department of Neuropsychiatry, Toyama Medical and Pharmaceutical University Faculty of Medicine 2Department of Neuropsychiatry, Koseiren Namerikawa Hospital 3Sena-en Keyword: Cytogenetic survey , Mental retardation , Institution population , Down's syndrome , Autosomal abnormality pp.65-71
Published Date 1986/1/15
DOI https://doi.org/10.11477/mf.1405204088
  • Abstract
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 A cytogenetic survey of 389 patients in a Japanese institution for the mentally retarded is reported. Abnormal karyotypes were found in 27 (6.9%) patients, of whom 22 (5.7%) had clinical Down's syndrome with 21 trisomy, and 5 (1.3%) other autosomal abnormalities. No individual with sex chromosome abnormality was found. The clinical details of the patients with autosomal abnormalities other than 21 trisomy are presented.

 The frequency of chromosome aberrations was lower compared with similar surveys, which leads to the conclusion that the population of the institution for the mentally retarded is determined by not only medical factors but also social conditions.


Copyright © 1986, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-126X 印刷版ISSN 0488-1281 医学書院

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