Limb-girdle myasthenia is a rare disorder which includes familial and autoimmune forms.
Myasthenia gravis is an uncommon disease in children and its diagnosis may be difficult.
We report here five cases of autoimmune juvenile LGM starting before the age of 16
years with attention to clinical diagnostic difficulties, evolution, laboratory and
instrumental data as well as response to treatment. Diagnosis of limb-girdle myasthenia
requires a strong index of suspicion also in childhood. We suggest that this form
be suspected in children with unclassifiable myopathy, mostly affecting deltoid muscles
and lower extremities.
Juvenile - limb-girdle myasthenia