Orthostatic tremor secondary to primary malignant melanoma of the spinal cord: A case report.

Orthostatic tremor is a rare entity that can be characterized by specific high-frequency tremors when the subject is standing. Considering that it remains unknown why this condition appears, some possible associations, such as primary spinal cord melanoma, should be considered. Thus, a comprehensive assessment of these types of patients is required. Our case report may facilitate the understanding of the pathophysiology and clinical symptoms of this disease.