Synonyms: Mazzanti syndrome | NS/LAH
A Noonan-related syndrome characterized by facial anomalies suggestive of Noonan syndrome loose anagen hair frequent congenital heart defects distinctive skin features (darkly pigmented skin keratosis pilaris eczema or ichtyosis) and short stature that is often associated with a growth hormone deficiency. Psychomotor delay with attention deficit/hyperactivity disorder (ADHD) is frequently observed.
Data from Orphanet are used to provide information on a disease's name, synonym(s), and overview. Reference: Access aggregated data from Orphanet at Orphadata. Orphadata: Free access data from Orphanet. © INSERM 1999. Available on http://www.orphadata.org. Data version April 2026
Newly diagnosed with
Noonan syndrome-like disorder with loose anagen hair?
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Advocacy Organizations
Heart of a Giant Foundation
The mission of the HGF is to achieve better health outcomes for heart diseases and related chronic health conditions in our communities and enhance the quality of life through health education, care support, and connection to community resources.
HeartCharged
Ending preventable deaths from undiagnosed heart conditions and sudden cardiac arrest, especially in young people, and providing patient-to-patient support.
Hypertrophic Cardiomyopathy Association
Providing support, advocacy, and education to patients, families, the medical community, and the public about hypertrophic cardiomyopathy and all thick heart muscle disorders, while supporting research and fostering the development of treatments.
Lymphangiomatosis & Gorham’s Disease Alliance
We connect patients and families to peers and networks of care, partner to advance new research, and educate the medical community to help all people navigating complex lymphatic anomalies have hope for a healthier tomorrow.
PPP2CA Pathways
PPP2CA Pathways connects families, shares strength, and supports the research community in the search for answers to Houge-Janssens Syndrome type 3.
RASopathies Network
Our mission is to advance research to improve the quality of life for RASopathy families by bringing together clinicians, scientists, and families.
RareDNA Foundation
Dedicated to improving outcomes for individuals and families affected by rare DNA heart mutations by advancing awareness, access and action. We increase awareness among medical professionals and the public, provide education and resources on diagnosis and treatment, support scientific research, and advocate for faster diagnostic pathways, giving families the knowledge and care they need.
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Clinical Trials
For a list of clinical trials in this disease area, please click here.