<prompt> Opsomyoclonus is encountered as CF of ?MeningiomaNeuroblastomaNeurofibromatosisExcision  <response>: Ans. is b i.e. Neuroblastoma Opsoclonus-Myoclonus Syndrome Opsoclonus is a disorder of eye movement characterized by involuntary, chaotic saccades that occur in all directions of gaze; it is frequently associated with myoclonus and ataxia. Causes of Opsoclonus-myoclonus a Idiopathic b Cancer-related paraneoplastic - cancers associated with opsoclonus-myoclonus are usually lung and breast cancers in adults and neuroblastoma in children. 