X‐linked mental retardation with marfanoid habitus

Abstract
Here we report on two pairs of mildly to moderately mentally retarded brothers with marfanoid habitus and similar craniofacial changes. They had a long and narrow face, small mandible, high‐arched palate, and hypernasal voice, as previously reported by Lujan et al (Am J Med Genet 17:311–322, 1984) in four mentally retarded males of a large kindred. The present data suggest the existence of a specific type of X‐linked mental retardation with marfanoid habitus.

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