Myasthenia Gravis

How is myasthenia gravis diagnosed?

A consult with a neurologist is needed to confirm the diagnosis. Tests include:

• Blood Test
  To detect antibodies that are abnormally high in MG
• Repetitive Nerve Stimulation (RNS)
  Small, safe and tolerable electric currents are delivered to nerves in quick succession to check nerve responses and function
• Single Fiber Electromyography (SFEMG)
  A small needle electrode is inserted into the muscles to record differences in response time between muscle fibres
• Computed Tomography (CT) Scan
  Approximately 10-15% of patients with MG have an associated thymoma, a tumour of the thymus. The thymus is a gland in the chest that is involved in the immune system. A CT scan may be needed to check for a thymoma. Most of these thymomas are not malignant.