Tumefactive Multiple Sclerosis presenting as Acute Ischemic Stroke

摘要

Background and Purpose:Multiple sclerosis (MS) plaques appear as well-demarcated, homogenous small ovoid lesions on magnetic resonance imaging (MRI). Atypical radiographic features of MS lesions include size greater than 2 cm, mass effect, and edema. Tumefactive MS lesions can radiographically mimic intra-cranial neoplasms, infarction, as well as infections. In atypical cases of tumefactive demyelinating lesions, brain biopsy may be required for the diagnosis.