Developmental Dyspraxia in a Family with X‐linked Mental Retardation (Renpenning Syndrome)

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Abstract
The existence of severe developmental speech dyspraxia in a member of a family that is typical of other reports of X-linked mental retardation without physical abnormality (Renpenning syndrome) was described. Other family members have evidence of motor or speech dyspraxia. Other reports of X-linked mental retardation have mentioned verbal disability, which suggests that developmental dyspraxia may be quite common in these familites. Developmental dyspraxia of speech is amenable to specific types of intervention; after 2 yr of such intervention the patient''s adaptive skills reflect normal non-verbal intellectual ability, despite persistent speech deficits. This functional improvement shows how important it is to identify dyspraxia in young children, who may otherwise be labelled mentally retarded.