Neuropathic pain is the sensation of pain due to abnormal discharges of impaired or injured neural structures in the peripheral &/or central nervous system.
It is characterized by hyperesthesia, hyperalgesia and allodynia.
Common neuropathic pain syndromes are central neuropathic pain, painful diabetic peripheral neuropathy, postherpetic neuralgia, trigeminal neuralgia, postsurgical neuropathic pain, HIV-related neuropathy, lumbosacral radiculopathy and complex regional pain syndrome.
A 38-year-old right-handed man had had epilepsy since 2 months of age. There was no relevant family history. Perinatal history was unremarkable. No other risk factors such as central nervous system infection or cerebral trauma were identified. Developmental history did not show major delay. His epilepsy was uncontrolled despite trying valproate, carbamazepine, clobazam, levetiracetam, oxcarbamazepine and perampanel.