Treating acute ischemic stroke in a patient with multiple sclerosis: A challenging issue.

Multiple sclerosis (MS) is a chronic disease characterized by inflammation, demyelination and neurodegeneration in the central nervous system. Recent studies suggested that patients with MS might have a greater risk of ischaemic stroke (IS). IS treatment with intravenous alteplase (IVA) in MS has rarely been reported. This could be due to the challenging diagnosis between acute IS and MS relapse, considering that clinical and neuroradiological findings might overlap. Here we report a 47-year-old man with a 6-year history of relapsing-remitting MS who presented to the emergency room for acute left limbs weakness and hypoesthesia diagnosed as ischemic stroke after advanced MRI imaging. Patient was treated with IVA and treatment was complicated by a parenchymal hematoma (PH) despite low risks due to young age, low NIHSS score, small ischemic lesion and absence of multiple vascular risk factors. We discuss the possible relationship between MS and IS and the use of IVA in MS patients and finally we consider the possible causes of the PH including the MS disease-modifying therapies.