A new era in MS diagnosis is here. The 2024 McDonald Diagnostic Criteria updates are helping doctors identify MS more quickly and with more certainty than ever before. New tools, such as optical coherence tomography (OCT) to assess the optic nerve and kappa free light chain testing in spinal fluid, offer less invasive, more accessible options for finding evidence of MS. In the past, people often waited years for an MS diagnosis. Now, many can get answers within months — or even weeks. | National