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Start free with EleplanNeonatal Marfan syndrome
ORPHA:284979Disease
Also called Neonatal MFS
What it is
Neonatal Marfan syndrome is a rare, severe and life-threatening genetic disease, occuring during the neonatal period, characterized by classical Marfan syndrome manifestations in addition to facial dysmorphism (megalocornea, iridodonesis, ectopia lentis, crumpled ears, loose redundant skin giving a 'senile' facial appearance), flexion joint contractures, pulmonary emphysema, and a severe, rapidly progressive cardiovascular disease (including ascending aortic dilatation and severe mitral and/or tricuspid valve insufficiency). Additionally, skeletal manifestations (arachnodactyly, dolichostenomelia, pectus deformities) are also associated.
Key facts
- Age of onset
- Infancy, Neonatal
- Inheritance
- Autosomal dominant
- Classified as
- Disease
Signs and symptoms
Very common80–99%
27- Abnormal cardiac ventricle morphology
- Abnormality of the cardiovascular system
- Adducted thumb
- Arachnodactyly
- Ascending tubular aorta aneurysm
- Cutis laxa
- Decreased testicular size
- Dolichocephaly
- Ectopia lentis
- Enlarged thorax
- Feeding difficulties
- Flexion contracture
- Heart murmur
- High myopia
- Hypoxemia
- Iridodonesis
- Lipoatrophy
- Long fingers
- Long toe
- Megalocornea
- Mitral valve prolapse
- Motor delay
- Neonatal respiratory distress
- Pectus carinatum
- Small for gestational age
- Talipes calcaneovarus
- Tricuspid valve prolapse
These ranges are how often a sign appears across everyone diagnosed, not a prediction for one person — most people have some of these and not others. Orphanet also records findings that are specifically absent in this disease; those are in the data but not listed here.
Gene
ICD-10 codes
ICD-10 has no distinct code for most rare diseases, so many are filed under the nearest available one. A shared code identifies the group, not this disease — the ORPHAcode above is what identifies it.
Related health topics
Reached through the ICD-10 categories this disease is filed under, so these describe the broader group rather than this disease specifically.
Cross-references
Orphadata Science: Free access data from Orphanet. © INSERM 1999. Data version 2026-06-23. Available under CC BY 4.0. This is a reference, not medical advice.
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