Question

A 42-year-old female has a 6-month history of gradually worsening muscle weakness that improves with rest. She also has intermittent diplopia. Which investigation is recommended first-line to confirm the suspected diagnosis of myasthenia gravis?

Accepted Answer

Acetylcholine receptor antibody test

Answer

Edrophonium (Tensilon) test

Answer

Ice pack test

Answer

Repetitive nerve stimulation test

Answer

CT scan of the thymus

Practice question

A 42-year-old female has a 6-month history of gradually worsening muscle weakness that improves with rest. She also has intermittent diplopia. Which investigation is recommended first-line to confirm the suspected diagnosis of myasthenia gravis?