Duplication of proximal 15q as a cause of Prader-Willi syndrome
β Scribed by Pettigrew, Anjana L. ;Gollin, Susanne M. ;Greenberg, Frank ;Riccardi, Vincent M. ;Ledbetter, David H. ;Opitz, John M. ;Reynolds, James F.
- Publisher
- John Wiley and Sons
- Year
- 1987
- Tongue
- English
- Weight
- 628 KB
- Volume
- 28
- Category
- Article
- ISSN
- 0148-7299
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π SIMILAR VOLUMES
A deletion of the long arm of chromosome 15 (usually involving bands 15qll-q12) has been seen in approximately 50% of Prader-Willi syndrome (PWS) patients [Ledbetter et al, 19821. However, 14 patients with non-PWS (or atypical PWS) phenotype with 15q deletion indicate great clinical variability. A d
A boy with bilateral colobomas, preauricular pits, and developmental delay had a 46,XY, 22q + karyotype. His parents had normal chromosomes. The abnormality of 22q was interpreted as a de novo tandem duplication of 22qll.l + q11.2. Although no anal abnormality was identified, his manifestations are
## Abstract PraderβWilli syndrome (PWS) is caused by the disturbed expression of genes from the imprinted region of 15q11βq13, but the specific contributions of individual genes remain unknown. Most paternal PWS deletions are bracketed by recurrent breakpoints BP1 or BP2 and BP3. Atypical deletions