PubMed · 11756074
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Neil R M Buist. 2002. Height and cataract.. https://doi.org/10.1093/ajcn%2F75.1.162
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Metaphyseal chondrodysplasias (MCD) are skeletal disorders characterized by metaphyseal irregularities and, usually, by short stature. In MCD, wide heterogeneity exists with regard to clinical and radiological changes. We report on a patient with clinical and radiological findings of MCD who had coxa valga and normal height with metaphyseal involvement of the long bones. The short radii and ulnae showed a very severe change in their distal metaphyses, leading to mesomelic shortening confined to the upper limbs. Hematological, ophthalmological, and hearing examinations were normal. This type of MCD appears to represent a yet undescribed syndrome.
The Richieri-Costa-Pereira syndrome is a rare autosomal recessive disorder characterized by short stature, Robin sequence, cleft mandible, pre/postaxial anomalies and clubfoot. Of 15 families reported with this disorder 14 are from Brazil suggesting a founder effect. We studied 15 families using identity-by-descent as a hypothesis to attempt gene localization We have examined through linkage analysis 497 polymorphic-markers and also performed direct sequencing of exons for 10 candidate genes selected on the basis of their expression in the developing mandible and limb. No evidence for allele sharing at any locus tested or mutations in candidate genes was found. Additional higher resolution mapping, new families and other candidate genes might improve future chances of gene identification.