Etiological Factors of Opsoclonus Myoclonus Ataxia Syndrome: A Single Center Experience with Eight Children

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Objective: Opsoclonus myoclonus ataxia syndrome (OMAS) is a rare neurological disorder characterized by acute/subacute onset multi-directional chaotic eye movements, accompanied by myoclonus and cerebellar ataxia; as well as sleep disturbance, cognitive dysfunction, and behavioral disturbance can be observed. Methods: We examined the information of eight patients (four females, four males) who applied to the hospital with OMAS between 2013 and 2020 from the medical records of the patients. Results: The median age of onset of the initial symptoms was 17.5 months (8-30 months). The most common initial complaints were abnormal eye movement and gait unsteadiness, respectively. Paraneoplastic OMAS was observed in three patients (37.5%), whereas idiopathic and infection-related OMAS was detected in three, and two patients, respectively. Conclusion: We emphasize that all symptoms of OMAS may not occur simultaneously, therefore comprehensive systemic investigations, and close observation should be made in patients with suspected OMAS.