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  • Title: Diagnostic/genetic studies in mental retardation.
    Author: Opitz JM.
    Journal: Postgrad Med; 1979 Oct; 66(4):205-7, 210-1, 213-4. PubMed ID: 482176.
    Abstract:
    Excluding environmental, psychotic, and unclassified categories, a total of 1,231 cases of severe mental retardation were found in the Central Wisconsin Center study. Some 45% of cases were estimated to be genetically caused or predisposed, but in only 15% was the risk of recurrence considered high. Nevertheless, I feel strongly that parents of all retarded patients deserve etiologic/diagnostic counseling.
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