case_images: PMC9968443_01
case_images: Normal brain MRI (T1-weighted imaging) with no mass effect. Relative volume loss is seen in other sections.
case_images: cureus-0015-00000034268-i01.jpg
case_images: PMC9968443_01_cureus-0015-00000034268-i01.jpg
case_images: FIG1
case_images: Imaging showed cerebral atrophy relative to age but no mass lesion or abnormal intensity on T2-weighted imaging (Figure 1).
case_images: Clinical course of the patient. . CRO: ceftriaxone; ECT: electroconvulsive therapy; HL: haloperidol; IVIG: intravenous immunoglobulin; mPRED: methylprednisolone; PLEX: plasma exchange; RIX: rituximab
case_images: cureus-0015-00000034268-i02.jpg
case_images: PMC9968443_01_cureus-0015-00000034268-i02.jpg
case_images: FIG2
case_images: A month later, he was discharged to a rehabilitation facility (Figure 2).  The clinical course is shown in Figure 2.