Table 1. Autoantibodies tested in the present study, associated clinical syndromes and frequent symptoms (adapted from Wandinger et al 2011).

Autoantibody	Clinical syndrome	Frequent symptoms
Anti-glutamate receptor (type NMDA)	Anti-glutamate receptor (type NMDA) encephalitis	Psychosis, memory-/language impairment, seizures, impaired consciousness, dyskinesia, movement disorders, dysautonomia, hypoventilation
Anti-glutamate receptor (type AMPA)	Limbic encephalitis, atypical psychosis	Memory deficits, confusion, disorientation, seizures, agitation, aggressive behaviour
Anti-GABAB receptor	Limbic encephalitis	Seizures, confusion, memory deficits, behavioural disorders, paranoia, hallucinations
Anti-LGI1	Limbic encephalitis	Epilectic seizures, memory deficits, confusion, dis- orientation, hyponatriaemia, myoclonus, dysautonomia
Anti-CASPR2	Neuromyotonia, Morvan‘s syndrome, Limbic encephalitis	Peripheral neuronal hyperexcitability, muscle spasms/ fasciculations/myokymia, seizures, memory deficits, confusion, disorientation, neuropathic pains, sleeping disorders, dysautonomia, weight loss
Anti-DPPX	Autoimmune encephalitis	Anxiety, forgetfulness, confusion, hallucinations, muscle spasms, tremor and pleocytosis (in CSF)

Abbreviations: NMDA: N-methyl-D-aspartate, AMPA: α-amino-3-hydroxy-5-methyl-4-isoxazole propionic acid, GABA: γ-amino butyric acid, LGI1: leucine-rich glioma-inactivated protein 1, CASPR2: contactin-associated protein 2, DPPX: dipeptidyl aminopeptidase-like protein 6