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Recurrent painful ophthalmoplegic neuropathy (RPON) is a rare condition that manifests as headache and ophthalmoplegia. It typically occurs in children. Although migraine or neuropathy have been suggested as etiologies, the precise etiology remains unclear. In the International Classification of Headache Disorders 3rd edition-beta version (ICHD3β) (code 13.9), RPON was categorized into painful cranial neuropathies and other facial pains. We encountered a 48-year-old woman who had diplopia and right ptosis. The administration of prednisolone led to the immediate improvement of her oculomotor palsy, but residual mydriasis remained. Based on this case, the pathophysiology of RPON may involve temporary nerve inflammation with migraine. Repeated and severe migraine attacks may cause irreversible nerve damage. Thus, medication for migraine prophylaxis might be needed to prevent RPON.

Recurrent Painful Ophthalmoplegic Neuropathy with Residual Mydriasis in an Adult: Should it Be Classified as Ophthalmoplegic Migraine?