The Spanish Group showed that antibodies were detected only in CSFin 8% of patients;34 while theDutch Group showed that CBA in CSF lacks specificity, where only 53% of CSF samplestested positive.11 Associationwith tumor is uncommon in anti-LGI1 encephalitis, and is estimated to be found in10-11% of patients.11,30,34. Here, LGI1 is linked to viral encephalitis.