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Start free with EleplanDistal deletion 15q syndrome
ORPHA:1596Malformation syndrome
Also called 15q26 deletion syndrome · Distal monosomy 15q · Monosomy 15q26 · Telomeric 15q deletion syndrome
What it is
Distal monosomy 15q is a rare chromosomal anomaly syndrome characterized by pre- and postnatal growth restriction, developmental delay, variable degrees of intellectual disability, hand and foot anomalies (e.g. brachy-/clinodactyly, talipes equinovarus, nail hypoplasia, proximally placed digits) and mild craniofacial dysmorphism (incl. microcephaly, triangular face, broad nasal bridge, micrognathia). Neonatal lymphedema, heart malformations, aplasia cutis congenita, aortic root dilatation, and autistic spectrum disorder have also been reported.
Key facts
- Prevalence
- <1 / 1 000 000
- Age of onset
- Antenatal, 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%
47- 2-3 toe cutaneous syndactyly
- Abnormal aortic arch morphology
- Abnormality of the dentition
- Attention deficit hyperactivity disorder
- Autistic behavior
- Bicuspid aortic valve
- Bifid tongue
- Blepharophimosis
- Broad nasal tip
- Cleft palate
- Coarctation of aorta
- Coarse facial features
- Congenital diaphragmatic hernia
- Cryptorchidism
- Decreased serum insulin-like growth factor 1
- Delayed speech and language development
- Failure to thrive
- Finger clinodactyly
- Flat occiput
- Generalized joint hypermobility
- Genu valgum
- Global developmental delay
- Growth delay
- Hearing impairment
- Hip dislocation
- Hypertelorism
- Hypospadias
- Low 1-minute APGAR score
- Low-set ears
- Microcephaly
- Micrognathia
- Micropenis
- Mitral stenosis
- Postnatal growth retardation
- Pulmonary hypoplasia
- Seizure
- Short distal phalanx of finger
- Short finger
- Short philtrum
- Short stature
- Small hand
- Small nail
- Strabismus
- Talipes equinovarus
- Thin upper lip vermilion
- Triangular face
- Upslanted palpebral fissure
Sometimes5–29%
10- Abnormal localization of kidney
- Aplasia cutis congenita over the scalp vertex
- Cystic hygroma
- Double outlet right ventricle with doubly committed ventricular septal defect and pulmonary stenosis
- Hypoplastic left heart
- Mitral atresia
- Multicystic kidney dysplasia
- Patent ductus arteriosus
and 2 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.
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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