<prompt> Opsoclonus is a feature of?Carcinoma lungRetinoblastomaFocal seizure with dyscognitive changesExtrapyramidal damage in Wilson disease  <response>: Opsoclonus - Involuntary jerky movement of eye - Disordered eye movement involuntary chaotic saccades in all direction of gaze Lesion Fastigial nucleus in cerebellum Leading cause of opsoclonus in Adult population is Carcinoma lung breast Carcinoma In Pediatric- Neuroblastoma 