case_images: PMC9894729_01
case_images: T1 series of magnetic resonance imaging (MRI)
case_images: cureus-0015-00000033325-i01.jpg
case_images: PMC9894729_01_cureus-0015-00000033325-i01.jpg
case_images: FIG1
case_images: Magnetic resonance imaging (MRI) of his brain displayed a T1 isointense (Figure 1), T2 hypointense (Figure 2) ring-enhancing lesion in the left cerebellar hemisphere, with restricted diffusion, and surrounding vasogenic edema resulting in mass effect over the fourth ventricle, left cerebellar peduncle, and pontocerebellar cistern causing mild hydrocephalus.
case_images: T2 series of magnetic resonance imaging (MRI)
case_images: cureus-0015-00000033325-i02.jpg
case_images: PMC9894729_01_cureus-0015-00000033325-i02.jpg
case_images: FIG2
case_images: Magnetic resonance imaging (MRI) of his brain displayed a T1 isointense (Figure 1), T2 hypointense (Figure 2) ring-enhancing lesion in the left cerebellar hemisphere, with restricted diffusion, and surrounding vasogenic edema resulting in mass effect over the fourth ventricle, left cerebellar peduncle, and pontocerebellar cistern causing mild hydrocephalus.
case_images: Brain biopsy demonstrating lymphoplasmacytic infiltrate
case_images: cureus-0015-00000033325-i03.jpg
case_images: PMC9894729_01_cureus-0015-00000033325-i03.jpg
case_images: FIG3
case_images: Pathology was sent to New York-Presbyterian Columbia University Irving Medical Center due to atypical lymphoplasmacytic infiltrates seen in pathology (Figure 3).