Juvenile myasthenia gravis

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Juvenile myasthenia gravis

ORPHA:391497Clinical subtype

Also called Childhood myasthenia gravis · Juvenile acquired myasthenia · Juvenile autoimmune myasthenia gravis

What it is

Juvenile myasthenia gravis (MG) is a rare form of MG, an autoimmune disorder of the neuromuscular junction resulting in ocular manifestations or generalized weakness, with onset before 18 years of age.

Key facts

Age of onset
Adolescent, Childhood, Infancy, Neonatal
Inheritance
Not applicable
Classified as
Clinical subtype

Recorded for the broader condition

Prevalence
1-9 / 100 000Myasthenia gravis

Orphanet records these for the broader condition rather than for this specific form. They are a starting point, not a figure for this subtype — subtypes often differ, and some are defined by being rarer than the condition they sit under.

ICD-10 codes

G70.0filed under a broader ICD-10 category — shared with 2 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

MONDO 0018325UMLS C5680023

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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