Neuropsychiatry and deletions of 18q; case report and diagnostic considerations
SourceGenetic Counseling, 17, 3, (2006), pp. 307-13
Article / Letter to editor
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SW OZ BSI KLP
SubjectUMCN 5.1: Genetic defects of metabolism
The 18q deletion syndrome can be caused by several terminal and interstitial deletions of which terminal deletions of the distal part of 18q are the most frequent and known as the DeCroughy syndrome. The neuropsychiatric phenotype is not well documented and includes disorganised and disinhibited behaviours as well as language difficulties. Non development of language seems to be specific for cases with a more proximally located interstitial deletions. In the present paper a 18-year-old severely mentally retarded male with an interstitial deletion of 18q is described (46.XY,del(18)(q12.1q22.1) who was referred for behavioural problems and neuropsychiatric evaluation. No categorical psychiatric diagnosis could be established. Given this and other reports, it is advocated to describe the psychopathological phenotype of 18q deletions in a dimensional way that will result in a clinical picture characterised mainly by symptoms from the motor and motivation domains. Treatment should include primarily behavioural measures, combined if necessary with symptomatic psychopharmacotherapy.
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