Overview

The present study is a prospective cohort study aiming to improve the clinical capacity in the diagnosis and natural history of Chinese patients with myasthenia gravis (MG). 300 MG patients are planned to recruit, document and prospectively follow up. Management of screening test and cohort manifestation are studied.

Eligibility

Inclusion Criteria:

• fluctuating muscle weakness and fatigability, along with one of the below:
• more than 10% amplitude decrement in low frequency repetitive nerve stimulation,less than 10% amplitude increment in high frequency repetitive nerve stimulation;
• anti-AChR or MuSK antibody positivity;
• positive to the neostigmine test;
• understanding and assigning the informed consent form, and having a good compliance with the follow up.

Exclusion Criteria:

• excluding the possible diagnosis of Lambert-Eaton syndrome, congenital myasthenia syndrome,botulism injection, chronic progressive extraocular ophthalmoplegia, etc;
• participating other clinical trials;
• poor compliance to the follow up.