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Start free with EleplanGlobal developmental delay-osteopenia-ectodermal defect syndrome
ORPHA:73223Malformation syndrome
What it is
A rare genetic disease characterized by global developmental delay with language and cognition deficiencies, behavioral problems, osteopenia, joint laxity, skin defects consisting of hyperkeratosis and sweat gland and melanocyte abnormalities with hypopigmented areas, and abnormal hair structure. Mild facial dysmorphism (prominent forehead, thick eyebrows, epicanthal folds, broad nasal bridge, long philtrum, and micrognathia), abnormalities of the teeth, and skeletal and cardiac anomalies have also been described.
Key facts
- Prevalence
- <1 / 1 000 000
- Age of onset
- Childhood
- Inheritance
- Unknown
- Classified as
- Malformation syndrome
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%
16- Abnormality of dermal melanosomes
- Abnormality of hair texture
- Abnormal temper tantrums
- Aggressive behavior
- Attention deficit hyperactivity disorder
- Atypical behavior
- Depigmentation/hyperpigmentation of skin
- Epidermal thickening
- Hypocalciuria
- Hypoplastic sweat glands
- Impulsivity
- Joint hypermobility
- Orthokeratotic hyperkeratosis
- Osteopenia
- Short attention span
- Thickened skin
Sometimes5–29%
21- Broad forehead
- Clinodactyly of the 2nd finger
- Clinodactyly of the 4th finger
- Conical incisor
- Dental malocclusion
- Dilation of Virchow-Robin spaces
- Epicanthus
- Hyperlordosis
and 13 more in this range
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.
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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