Author contributions
CL and HC collected all the clinical data. XZ performed and read all the MRI scans. XX and CL followed up the cases. QZ and HL did IHC assay of the LGI1 antibody. ZT provided advice on neuropsychological assessment. CL wrote the first draft of the manuscript. HCK and HEK contributed to main idea of the manuscript. All authors contributed to the revision of the manuscript and approved the submission.