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Start free with EleplanAspartylglucosaminuria
ORPHA:93Disease
Also called Aspartylglucosaminidase deficiency
What it is
A rare oligosaccharidosis characterized by facial dysmorphism, progressive intellectual disability and psychomotor deterioration due to accumulation of glycoasparagines in tissues and body fluids.
Key facts
- Prevalence
- 1-9 / 1 000 000 (at birth, Australia)
- Age of onset
- Childhood
- Inheritance
- Autosomal 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
Very common80–99%
17- Abnormal facial shape
- Abnormality of amino acid metabolism
- Abnormality of speech or vocalization
- Aspartylglucosaminuria
- Delayed speech and language development
- Dyskinesia
- Gingival overgrowth
- Hypertelorism
- Intellectual disability
- Large face
- Mandibular prognathia
- Microtia
- Scoliosis
- Short nose
- Thick vermilion border
- Umbilical hernia
- Wide nasal bridge
Common30–79%
10Sometimes5–29%
16- Abnormal vertebral morphology
- Arthritis
- Atypical behavior
- Beaking of vertebral bodies
- Chronic otitis media
- Delayed skeletal maturation
- Hepatomegaly
- Inguinal hernia
and 8 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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