What is the prognosis for opsoclonus myoclonus?

The prognosis for opsoclonus myoclonus varies depending on the symptoms, and the presence and treatment of tumors. With the treatment of the underlying cause of the disorder, there may be an improvement of symptoms. The symptoms sometimes recur without warning. Generally, the disorder is not fatal.

This answer is based on source information from the National Institute of Neurological Disorders and Stroke.