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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
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Opsomyoclonus is encountered as C/F of -
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The correct answer is  "At least 50% of children with opsoclonus-myoclonus have an underlying neuroblastoma." - Harrison
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 

Idiopathic
Cancer-related (paraneoplastic)


Cancers associated with opsoclonus-myoclonus are usually lung and breast cancers in adults and neuroblastoma in children.