The FDA approvals of siponimod and cladribine for secondary progressive multiple sclerosis raise questions about the diagnostic criteria for multiple sclerosis phenotypes and their applicability to clinical trials. A simpler classification for the disease could be the answer.
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O.S. serves on the editorial board of Therapeutic Advances in Neurological Disorders, has served on data monitoring committees for Genentech–Roche, Pfizer and TG Therapeutics without monetary compensation, has advised Celgene, EMD Serono, Genzyme and Serono, and has received grant support from Sanofi Genzyme. N.M. declares no competing interests.
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Manouchehri, N., Stüve, O. Trials and therapies in secondary progressive MS, simplified. Nat Rev Neurol 15, 431–432 (2019). https://doi.org/10.1038/s41582-019-0233-x
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DOI: https://doi.org/10.1038/s41582-019-0233-x