Micro syndrome

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Micro syndrome

ORPHA:2510Malformation syndrome

Also called WARBM · Warburg micro syndrome

What it is

A rare neurodevelopmental disorder characterized by severe intellectual disability, progressive spasticity, postnatal microcephaly, and ocular abnormalities, including congenital cataracts, microphthalmia, and optic atrophy. Other frequent findings are hypothalamic hypogonadism and brain malformations.

Key facts

Prevalence
<1 / 1 000 000
Age of onset
Childhood
Inheritance
Autosomal recessive
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

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.

Genes

RAB18Disease-causing germline mutation(s) (loss of function)
RAB3GAP1Disease-causing germline mutation(s) (loss of function)
RAB3GAP2Disease-causing germline mutation(s) (loss of function)
TBC1D20Disease-causing germline mutation(s) (loss of function)

ICD-10 codes

Q87.0filed under a broader ICD-10 category — shared with 154 other rare diseases

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

GARD 5534MONDO 0016649OMIM 600118OMIM 614222OMIM 614225OMIM 615663UMLS C5442005

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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