Updated international guidelines for diagnosing multiple sclerosis (MS) have been released, offering doctors clearer tools to make earlier and more accurate diagnoses and giving people living with the condition the chance to begin treatment sooner.
The McDonald Diagnostic Criteria, widely regarded as the global benchmark for diagnosing MS, were first introduced in 2001 and last revised in 2017. The latest updates have been published in The Lancet Neurology and are expected to improve outcomes by shortening the long wait many Australians currently face before receiving a diagnosis.
According to MS Australia’s World MS Day ‘My Diagnosis’ Report, it takes an average of nearly four years for Australians to receive a diagnosis after their first symptoms. The new criteria aim to reduce this delay and give patients quicker access to therapies that can help slow the progression of the disease.
“This is a major step forward in improving care and quality of life for people with MS in Australia and across the world,” said MS Australia’s CEO Rohan Greenland. “For too many Australians, an MS diagnosis comes only after years of stress, multiple tests and uncertainty. These updated criteria will allow people to begin treatment sooner and take control of their MS journey.”
MS Australia’s Head of Research, Dr Tennille Luker, said the changes will provide doctors with more certainty in identifying the disease. “These updated criteria provide a broader set of tools to diagnose MS earlier and with greater confidence—from advanced MRI techniques to simple eye scans and spinal fluid tests,” Dr Luker said. “In MS, time is brain. Earlier diagnosis means earlier treatment, which we know leads to better long-term outcomes for people with MS.”
The human impact of delayed diagnosis was echoed by Australians living with MS who contributed their experiences. “Waiting for a diagnosis had an enormous impact on me emotionally, my ability to focus and my ability to work,” said Laura. Sarah, who also faced years of uncertainty, added: “With the diagnosis came relief—an end to the disquieting uncertainty of ‘what is wrong with me?’—and the promise of disease-modifying therapies to stall neurodegeneration.”
The updated guidelines reflect advances in technology and research, and were developed by 56 international experts from 16 countries, including Australia. The review was coordinated by the International Advisory Committee on Clinical Trials in Multiple Sclerosis, co-sponsored by the US National MS Society and the European Committee for Treatment and Research in MS (ECTRIMS).
Key changes to the criteria include allowing MS to be diagnosed after a single clinical episode, recognising radiologically isolated syndrome as MS when supported by additional tests, and introducing less invasive diagnostic tools such as optical coherence tomography and new spinal fluid testing. The criteria have also been expanded to improve accuracy for children and adults over 50.
By combining medical advances with a focus on the lived experiences of people with MS, the revised guidelines aim to give clarity, reduce stress, and enable earlier treatment at the stage when it has the greatest impact.
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