Acquired sleep-related hypermotor epilepsy

An instance of sleep-related hypermotor epilepsy that is acquired during the lifetime of the individual. The seizures are triggered by an identifiable structural abnormality in the brain—typically detected by MRI—such as cortical dysplasia, tumors (e.g., low-grade gliomas), scars from prior injury or infection, vascular malformations (e.g., cavernomas), or post-traumatic changes.