Marker X‐associated mental retardation A study of 150 retarded males
- 1 June 1983
- journal article
- research article
- Published by Wiley in Clinical Genetics
- Vol. 23 (6) , 397-404
- https://doi.org/10.1111/j.1399-0004.1983.tb01973.x
Abstract
Male patients (150) with mental retardation of unknown origin were studied cytogenetically. Six patients (4%) were marker X-positive. All these index cases were found in a subgroup of patients with no dysmorphic features, significant neurological findings or childhood psychosis. In this subgroup the frequency was 8.8%. One of the index cases had a family history suggestive of X-linked mental retardation, 4 had retarded 1st degree relatives and 1 had no family history of mental retardation.Keywords
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