MRI activity in pre-symptomatic multiple sclerosis: the role of paramagnetic rim lesions beyond the 2024 McDonald diagnostic criteria.
BACKGROUND The 2024 McDonald criteria allow multiple sclerosis (MS) diagnosis in pre-symptomatic individuals but their association with MRI activity remains uncertain. We assessed whether paramagnetic rim lesions (PRL) predict future MRI activity beyond the 2024 McDonald criteria. METHODS We retrospectively included...