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Noonan syndrome.

Open access
Allanson, J E·1987·Journal of Medical Genetics

Abstract

Noonan syndrome was first described over 20 years ago by Noonan and Ehmkel; they defined a specific group of nine patients with valvular pulmonary stenosis who, in addition, had short stature, mild mental retardation, hypertelorism, and unusual facies.In retrospect, the first case was probably described by Kobylinski in 1883.2Since that time, over 300 cases have been reported in medical publications.The incidence of Noonan syndrome has been estimated to be between 1 in 1000 and 1 in 2500 live births.3The cardinal features of Noonan syndrome are short stature, congenital heart defect, broad or webbed neck, a peculiar chest deformity with pectus carinatum superiorly and pectus excava- tum inferiorly, and characteristic facies, which alter predictably with age to produce a discrete but changing phenotype which is described and illus- trated below.Good reviews of Noonan syndrome are to be found by Mendez and Opitz,4 Nora et al,5 Char et al,6 and Pearl.7

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Metadata

Authors
Allanson, J. E.
Venue
Journal of Medical Genetics
Publisher
BMJ
Published
1987-01
Volume
24
Issue
1
Pages
9-13
ISSN
  • 0022-2593 (ISSN-L)
  • 1468-6244
OpenAlex
W4212980172
Cited by
319
References
0
FWCI
1.59
Type
journal article
Language
en
Open access
bronze

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CoChat. (2026). Citation check: Noonan syndrome. https://app.cochat.ai/papers/10.1136/jmg.24.1.9
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Allanson, J. E. (1987). Noonan syndrome. Journal of Medical Genetics. https://doi.org/10.1136/jmg.24.1.9

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.