I |
I |
|
|
Ocular myasthenia |
IIA |
IIA |
|
|
Mild generalized myasthenia with slow progression: no crises, responsive to drugs |
IIB |
IIB |
|
|
Moderately severe generalized myasthenia : severe skeletal and bulbar involvement but no crises |
drug response less than satisfactory |
drug response less than satisfactory |
|
|
|
III |
III |
|
|
Acute fulminating myasthenia, rapid progression of severe symptoms, with respiratory crises and poor drug response |
IV |
IV |
|
|
Late severe myasthenia, same as III but progression over 2 years from class I to II |