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