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Classical Noonan syndrome is not associated with deletions of 22q11

Classical Noonan syndrome is not associated with deletions of 22q11 Deletions of 22qll cause DiGeorge sequence (DGS), velo‐cardio‐facial syndrome (VCFS), conotruncal anomaly face syndrome, and some isolated conotruncal heart anomalies. Demonstration of a 22qll deletion in a patient with manifestations of DGS and Noonan syndrome (NS) has raised the question of whether NS is another of the chromosome 22 microdeletion syndromes. This prompted us to evaluate a cohort of patients with NS for evidence of 22qll deletions. Five of 6 NS propositi studied in our laboratory with marker N25 (D22S75) did not have a 22qll deletion. A 2‐month‐old infant with several findings suggestive of NS did have a 22qll deletion, suggesting that a small number of 22qll deletion propositi may present with a NS‐like picture. However, most cases of NS must have another cause. © 1995 Wiley‐Liss, Inc. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png American Journal of Medical Genetics Part A Wiley

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References (11)

Publisher
Wiley
Copyright
Copyright © 1995 Wiley Subscription Services, Inc., A Wiley Company
ISSN
1552-4825
eISSN
1552-4833
DOI
10.1002/ajmg.1320560121
pmid
7747795
Publisher site
See Article on Publisher Site

Abstract

Deletions of 22qll cause DiGeorge sequence (DGS), velo‐cardio‐facial syndrome (VCFS), conotruncal anomaly face syndrome, and some isolated conotruncal heart anomalies. Demonstration of a 22qll deletion in a patient with manifestations of DGS and Noonan syndrome (NS) has raised the question of whether NS is another of the chromosome 22 microdeletion syndromes. This prompted us to evaluate a cohort of patients with NS for evidence of 22qll deletions. Five of 6 NS propositi studied in our laboratory with marker N25 (D22S75) did not have a 22qll deletion. A 2‐month‐old infant with several findings suggestive of NS did have a 22qll deletion, suggesting that a small number of 22qll deletion propositi may present with a NS‐like picture. However, most cases of NS must have another cause. © 1995 Wiley‐Liss, Inc.

Journal

American Journal of Medical Genetics Part AWiley

Published: Jan 13, 1996

Keywords: ; ; ;

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