RT Journal Article SR Electronic T1 Secondary Progressive Multiple Sclerosis JF Neurology - Neuroimmunology Neuroinflammation JO Neurol Neuroimmunol Neuroinflamm FD Lippincott Williams & Wilkins SP e200064 DO 10.1212/NXI.0000000000200064 VO 10 IS 1 A1 Tjalf Ziemssen A1 Virender Bhan A1 Jeremy Chataway A1 Tanuja Chitnis A1 Bruce Anthony Campbell Cree A1 Eva Kubala Havrdova A1 Ludwig Kappos A1 Pierre Labauge A1 Aaron Miller A1 Jin Nakahara A1 Celia Oreja-Guevara A1 Jacqueline Palace A1 Barry Singer A1 Maria Trojano A1 Ashwini Patil A1 Benedict Rauser A1 Thomas Hach YR 2023 UL http://nn.neurology.org/content/10/1/e200064.abstract AB Many challenges exist in the precise diagnosis and clinical management of secondary progressive multiple sclerosis (SPMS) because of the lack of definitive clinical, imaging, immunologic, or pathologic criteria that demarcate the transition from relapsing-remitting MS to SPMS. This review provides an overview of the diagnostic criteria/definition and the heterogeneity associated with different SPMS patient populations; it also emphasizes the importance of available prospective/retrospective tools to identify patients with SPMS earlier in the disease course so that approved disease-modifying therapies and nonpharmacological strategies will translate into better outcomes. Delivery of such interventions necessitates an evolving patient-clinician dialog within the context of a multidisciplinary team.ARR=annualized relapse rate; CDW=confirmed disability worsening; DMTs=disease-modifying therapies; DSP=Disease-Specific Programme; EDSS=Expanded Disability Status Scale; EU=European Union; GFAP=glial fibrillary acidic protein; IFN-β=interferon-beta; IQR=interquartile range; MS=multiple sclerosis; MSFC=MS functional composite; NA=North American; OCT=optical coherence tomography; PIRA=progression independent of relapse activity; PRO=patient-reported outcome; RCN=research collaboration network; RNFL=retinal fiber layer; RRMS=relapsing-remitting MS; SPMS=secondary progressive MS