We report on a 4-year-old boy with craniometadiaphyseal dysplasia (CMDD), wormian bone type. Component manifestations include a large head with prominent forehead, skull changes showing multiple wormian bones, wide long tubular bones without the usual metaphyseal flare, wide and short tubular bones
Gracile bone dysplasia
β Scribed by Thomas, Janet A.; Rimoin, David L.; Lachman, Ralph S.; Wilcox, William R.
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 52 KB
- Volume
- 75
- Category
- Article
- ISSN
- 0148-7299
- DOI
- 10.1002/(sici)1096-8628(19980106)75:1<95::aid-ajmg19>3.0.co;2-n
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β¦ Synopsis
Gracile bones are a frequent abnormality associated with fetal hypokinesia of any cause. With the exception of thin, undermineralized bones, the chondro-osseous structure is usually normal in these cases. We present a lethal skeletal dysplasia comprising minor anomalies, central nervous system abnormalities, gracile long bones, and abnormal chondro-osseous morphology. In addition to a short, disordered growth plate, the chondrocytes contained dilated loops of rough endoplasmic reticulum, suggesting an abnormality of an extracellular matrix protein. This protein appears to have effects on chondro-osseous and on facial and central nervous system development. We suggest the term ''gracile bone dysplasia'' to describe this disorder. Am.
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