We describe an unusual clinical and diagnostic feature of a @entity1 with @entity15 ( @entity15 ). A 25-year-old @entity1 was admitted to the Neurology department (December 2009) with one month history of rapid @entity73 . She had poor cognition, @entity2026 , reduction in visual acuity and temporal pallor of the optic discs. She had prolonged latencies of P100 component of visual evoked potentials (VEPs). Magnetic resonance imaging (MRI)-brain showed multifocal large (>=  3 cm) white-matter hypointense lesions in T1W and hyperintense in T2W and fluid-attenuated inversion recovery images and patchy enhancement. A diagnosis of tumefactive @entity15 was given. She received two consecutive 5-d courses of 1 g daily intravenous @entity1667 for 2 mo and oral @entity617 in dose of 80 mg twice/daily in between. At the 3(rd) month, Mini Mental State Examination and VEPs returned to normal but not the MRI. @entity1 continued oral @entity230 after hospital discharge (March 2010) for 9 mo with significant MRI improvement after which tapering of @entity230 started for a year. The @entity1 refused immunomodulation therapy due to her low socioeconomic status. Neither clinical relapse nor new MRI lesions were observed throughout the next 4 years. In spite of the aggressive course of tumefactive @entity15 variant, good prognosis may be seen in some @entity1 .

Variant of XXXX with dementia and tumefactive demyelinating brain lesions.

@entity1 :: ('9606', 'Species') :: ['woman', 'patients', 'patient', 'Patient'] @entity1667 :: ('MESH:D008775', 'Chemical') :: ['methylprednisolone'] @entity73 :: ('MESH:D003072', 'Disease') :: ['cognitive deterioration'] @entity2026 :: ('MESH:D001037', 'Disease') :: ['dysphasia'] @entity230 :: ('MESH:D013256', 'Chemical') :: ['steroids'] @entity15 :: ('MESH:D009103', 'Disease') :: ['MS', 'multiple sclerosis'] @entity617 :: ('MESH:D011239', 'Chemical') :: ['prednisolone']
@entity15 :: (MESH:D009103,Disease) :: ['multiple sclerosis']
