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General Information
Noonan syndrome
FlyBase ID
Disease Ontology Term
Parent Disease

This report describes general characteristics of the group of diseases classified as Noonan syndrome. Noonan syndrome is a genetically heterogeneous disorder, with multiple genes and mapped loci. A listing of Noonan syndrome subtypes, as defined by OMIM, may be found in the table below, with links to more detailed reports for subtypes that have been investigated using fly models.

[updated May 2015 by FlyBase; FBrf0222196]

Disease Summary Information
Parent Disease Summary: Noonan syndrome
OMIM report
Symptoms and phenotype

Noonan syndrome (NS) is an autosomal dominant disorder characterized by short stature, facial dysmorphism, and a wide spectrum of congenital heart defects. The distinctive facial features consist of a broad forehead, hypertelorism, downslanting palpebral fissures, a high-arched palate, and low-set, posteriorly rotated ears. Cardiac involvement is present in up to 90% of patients. Pulmonic stenosis and hypertrophic cardiomyopathy are the most common forms of cardiac disease, but a variety of other lesions are also observed. Additional relatively frequent features include multiple skeletal defects (chest and spine deformities), webbed neck, mental retardation, cryptorchidism, and bleeding diathesis (summary by Tartaglia et al., 2002 pubmed:11992261). [from OMIM:163950, 2015.04.14]

Congenital heart disease occurs in 50%-80% of individuals. Pulmonary valve stenosis, often with dysplasia, is the most common heart defect and is found in 20%-50% of individuals. Hypertrophic cardiomyopathy, found in 20%-30% of individuals, may be present at birth or develop in infancy or childhood. [Gene Reviews, Noonan Syndrome, 2020.08.21]


Noonan syndrome is a genetically heterogeneous disorder. [from OMIM:163950, 2015.04.14]

Noonan syndrome is most often inherited in an autosomal dominant manner. While many individuals with autosomal dominant NS have a de novo pathogenic variant, an affected parent is recognized in 30-75% of families. [Gene Reviews, Noonan Syndrome, 2020.08.21]

Cellular phenotype and pathology
Molecular information
External links
Disease synonyms
Search term: RASopathy
Turner's phenotype, karyotype normal (disorder)
Ortholog Information
Human gene(s) in FlyBase
    Other mammalian ortholog(s) used
      D. melanogaster Gene Information (0)
      Other Genes Used: Viral, Bacterial, Synthetic (0)
        Summary of Physical Interactions (0 groups)
        Alleles Reported to Model Human Disease (Disease Ontology) (0 alleles)
        Alleles Representing Disease-Implicated Variants
        Genetic Tools, Stocks and Reagents
        Sources of Stocks
        Contact lab of origin for a reagent not available from a public stock center.
        Bloomington Stock Center Disease Page
        Selected mammalian transgenes
        Publicly Available Stocks
        Selected Drosophila transgenes
        Publicly Available Stocks
        RNAi constructs available
        Publicly Available Stocks
        Selected Drosophila classical alleles
        Allele class
        Publicly Available Stocks
        References (4)