A consult with a neurologist is needed to confirm the diagnosis. Tests include:
Blood tests: To detect antibodies (e.g. anti-acetylcholine receptor 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 chest CT scan may be needed to check for a thymoma. Most of these thymomas are not malignant.
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