A Cytogenetic Survey of the Mentally Retarded Children / 대한산부인과학회잡지

ABSTRACT

OBJECTIVE: A cytogenetic survey of the mentally retarded children in Seoul City Welfare Center for the Mentally Retarded and St Peter school has been undertaken. METHODS: The chromosome analysis was carried out in 92 males and in 66 females as a total of 158 cases. RESULTS: Abnormal karyotypes were observed in 22.2% of the total cases (35/158). Autosome and sex chromosome anomaly were observed in 20.3%(32/158) and 1.9%(3/158) respectively. Of 35 cases of anomaly, 91.4%(32/35) was autosome anomaly and 8.6%(3/35), sex chromosome anomaly. CONCLUSION: Down syndrome karyotype was the most frequent anomaly among autosome anomalies which was 62.5%(20/32) and other autosome anomalies were observed in 37.5%(12/32).