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Start free with EleplanThumb deformity-alopecia-pigmentation anomaly syndrome
ORPHA:2251Malformation syndrome
Also called Sparse hair-short stature-skin anomalies syndrome
What it is
Thumb deformity-alopecia-pigmentation anomaly syndrome is a rare, genetic, congenital limb malformation syndrome characterized by short stature, sparse scalp hair, hypoplastic, proximally-placed thumbs, and skin hyperpigmentation with areas of 'raindrop' depigmentation. Presence of a single, upper central incisor has also been reported. There have been no further descriptions in the literature since 1988.
Key facts
- Prevalence
- <1 / 1 000 000
- Age of onset
- Infancy, 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
Common30–79%
17- Abnormal dental morphology
- Aphasia
- Camptodactyly of finger
- Echolalia
- Everted lower lip vermilion
- Fingernail dysplasia
- Global developmental delay
- Hypopigmented skin patches
- Intellectual disability
- Mutism
- Onychogryposis of fingernail
- Palmoplantar keratoderma
- Protruding ear
- Ridged fingernail
- Specific learning disability
- Triphalangeal thumb
- Urticaria
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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