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Start free with EleplanMonosomy 22 syndrome
ORPHA:96123Malformation syndrome
Also called Del(22) · Deletion 22
What it is
A rare autosomal anomaly syndrome, with a highly variable phenotype, typically characterized by short length, joint abnormalities (e.g. dysplasia, hyperextensibility, contractures, dislocation), congenital cardiac defects, and craniofacial dysmorphism (incl. microcephaly, a high, prominent, narrow and/or hairy forehead, epicanthus, upward-slanting and/or small palpebral fissures, broad, high or depressed nasal bridge and malformed ears). Delayed motor development and intellectual disability is observed in patients not presenting early demise.
Key facts
- Age of onset
- Neonatal
- Classified as
- Malformation syndrome
Signs and symptoms
Common30–79%
21- Abnormality of the periorbital region
- Clinodactyly of the 5th finger
- Epicanthus
- Flat face
- High forehead
- High palate
- Intellectual disability
- Long philtrum
- Meningioma
- Narrow palpebral fissure
- Open mouth
- Posteriorly rotated ears
- Prominent occiput
- Retrognathia
- Sarcoma
- Schwannoma
- Short neck
- Single transverse palmar crease
- Synophrys
- Thin vermilion border
- Wide nose
Sometimes5–29%
19- Abnormal blistering of the skin
- Aplasia of the thymus
- Clubbing
- Contractures of the large joints
- Cutis gyrata of scalp
- Finger syndactyly
- Gonadal neoplasm
- Hepatosplenomegaly
and 11 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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