Sporadic Hemiplegic Migraine Presenting ATP1A2 Mutation in Korea

Hemiplegic migraine (HM) is a rare form of migraine, characterized by migraine with reversible motor weakness. HM can be divided into sporadic and familiar HM based on familiarity. Mutations in CACNA1A, ATP1A2 and SCN1A were identified in familiar HM. We present a patient with sporadic HM exhibiting recurrent hemiplegia, mental change and fever along with headache attacks. During the hemiplegia, he showed perfusion delay in left middle cerebral artery territory. Genetic panel test revealed a likely pathogenic varia nt in ATP1A2.

An Autoimmune Encephalitis Case Associated with Pembrolizumab Use

Immune checkpoint inhibitors may be associated with various adverse events, including encephalitis. Here, we report a case of encephalopathy associated with pembrolizumab therapy. A 60-year-old male diagnosed with cholangiocarcinoma with peritoneal seeding presented altered mentality and cognitive function after using pembrolizumab. Electroencephalogram showed mild diffuse cerebral dysfunction. Cerebrospinal fluid (CSF) study showed no evidence of infection or autoimmune disease and no paraneoplastic antibody was detected from CSF and serum. After high-dose methylprednisolone intravenous infusion, patient’s mentality was fully recovered.