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Start free with EleplanIntellectual disability-polydactyly-uncombable hair syndrome
ORPHA:3082Malformation syndrome
Also called Kozlowski-Krajewska syndrome
What it is
Intellectual disability-polydactyly-uncombable hair syndrome is a multiple congenital anomalies/dysmorphic syndrome characterized by intellectual disability, postaxial polydactyly, phalangeal hypoplasia, 2-3 toe syndactyly, uncombable hair and facial dysmorphism (including frontal bossing, hypotelorism, narrow palpebral fissures, nasal bridge and lips, prominent nasal root, large abnormal ears with prominent antihelix, poorly folded helix, underdeveloped lobule and antitragus, and micrognathia evolving into prognatism). Cryptorchidism, conductive hearing loss and progressive thoracic kyphosis were also reported.
Key facts
- Prevalence
- <1 / 1 000 000
- Age of onset
- Neonatal
- 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%
34- Abnormality of epiphysis morphology
- Abnormality of immune system physiology
- Abnormality of the antihelix
- Abnormality of the antitragus
- Abnormality of the hair
- Abnormal palate morphology
- Abnormal rib morphology
- Aplasia/Hypoplasia of fingers
- Aplasia/Hypoplasia of the earlobes
- Aplasia/Hypoplasia of the eyebrow
- Aplasia/Hypoplasia of toe
- Broad hallux phalanx
- Clinodactyly of the 5th finger
- Conductive hearing impairment
- Cryptorchidism
- Frontal bossing
- Hernia of the abdominal wall
- Hypoplasia of penis
- Hypotelorism
- Intellectual disability
- Kyphosis
- Mandibular prognathia
- Metatarsus valgus
- Micrognathia
- Narrow nasal bridge
- Pectus carinatum
- Postaxial hand polydactyly
- Short neck
- Short stature
- Slow-growing hair
- Toe syndactyly
- Uncombable hair
- Upslanted palpebral fissure
- Wide intermamillary distance
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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