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Start free with EleplanIntellectual disability-seizures-abnormal gait-facial dysmorphism syndrome
ORPHA:513456Disease
Also called Skraban-Deardorff syndrome
What it is
A rare genetic multiple congenital anomalies/dysmorphic syndrome characterized by global developmental delay, intellectual disability, seizures, abnormal gait, and craniofacial dysmorphism (including coarse features, depressed nasal bridge, anteverted nares, broad nasal tip, prominent maxilla and upper lip, wide mouth, abnormal gingiva, and widely spaced teeth). Additional reported manifestations are ocular anomalies, cardiac defects, gastrointestinal problems, and autistic features. Brain imaging may show thin corpus callosum, white matter abnormalities, or dilated ventricles.
Key facts
- Prevalence
- <1 / 1 000 000
- Age of onset
- Infancy
- Inheritance
- Autosomal dominant
- Classified as
- Disease
Prevalence figures describe populations, not individuals, and are often estimates from a single study. Where the figure is an incidence or a birth prevalence, it says so.
Signs and symptoms
Very common80–99%
7Common30–79%
19- Abnormality of the gingiva
- Absent cupid's bow
- Anteverted nares
- Bilateral tonic-clonic seizure
- Brain imaging abnormality
- Coarse facial features
- Delayed ability to sit
- Delayed ability to walk
- Depressed nasal bridge
- Failure to thrive
- Feeding difficulties in infancy
- Generalized non-motor (absence) seizure
- Hypotonia
- Increased axial length of the globe
- Micrognathia
- Mild global developmental delay
- Prominent nasal tip
- Severe global developmental delay
- Sparse lateral eyebrow
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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