RT Journal Article SR Electronic T1 Anti-IgLON5 Disease JF Neurology - Neuroimmunology Neuroinflammation JO Neurol Neuroimmunol Neuroinflamm FD Lippincott Williams & Wilkins SP e962 DO 10.1212/NXI.0000000000000962 VO 8 IS 2 A1 Jana Werner A1 Ilijas Jelcic A1 Esther Irene Schwarz A1 Elisabeth Probst-Müller A1 Jakob Nilsson A1 Bernhard Schwizer A1 Konrad Ernst Bloch A1 Andreas Lutterotti A1 Hans-Heinrich Jung A1 Bettina Schreiner YR 2021 UL http://nn.neurology.org/content/8/2/e962.abstract AB Objective To expand the spectrum of anti-IgLON5 disease by adding 5 novel anti-IgLON5–seropositive cases with bulbar motor neuron disease-like phenotype.Methods We characterized the clinical course, brain MRI and laboratory findings, and therapy response in these 5 patients.Results Patients were severely affected by bulbar impairment and its respiratory consequences. Sleep-related breathing disorders and parasomnias were common. All patients showed clinical or electrophysiologic signs of motor neuron disease without fulfilling the diagnostic criteria for amyotrophic lateral sclerosis. One patient regained autonomy in swallowing and eating, possibly related to immunotherapy.Conclusion IgLON5 disease is an important differential diagnosis to evaluate in patients with bulbar motor neuron disease-like phenotype and sleep disorders. There is need for a deeper understanding of the underlying pathobiology to determine whether IgLON5 disease is an immunotherapy-responsive condition.AHI=apnea-hypopnoea-index; ALS=amyotrophic lateral sclerosis; ASV=adaptive servo-ventilation; CPAP=continuous positive airway pressure; FOIS=Functional Oral Intake Scale; OSA=obstructive sleep apnea; PEG=percutaneous endoscopic gastrostomy; PSG=polysomnography