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ORPHA:324422Disease
Also called CDG syndrome type Is · CDG-Is · CDG1S · Congenital disorder of glycosylation type 1s · Congenital disorder of glycosylation type Is
What it is
A form of congenital disorders of N-linked glycosylation characterized by microcephaly, hepatomegaly, edema of the extremities, intractable seizures, recurrent infections and increased bleeding tendency. The disease is caused by mutations in the gene ALG13 (Xq23).
Key facts
- Prevalence
- <1 / 1 000 000
- Age of onset
- Infancy, Neonatal
- Inheritance
- X-linked recessive
- Classified as
- Disease
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
Sometimes5–29%
15- Abnormality of brain morphology
- Abnormality of lateral ventricle
- Adducted thumb
- Anteverted nares
- Autism
- Clumsiness
- Cognitive impairment
- Decreased body weight
and 7 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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