CNTNAP2 and amnesia: Other causing diseases are Bickerstaff's-like brainstem encephalitis (70), stroke (71), Behcet's disease (72), paraneoplastic limbic encephalitis (e.g., Anti-Hu), and anti–contactin associated protein-like 2 (CASPR2) antibody-related autoimmune limbic encephalitis presenting with amnesia and seizures (73, 74).