Symptomatic de novo arteriovenous malformation in an adult: Case report and review of the literature

BACKGROUND: Cerebral arteriovenous malformations (AVMs) have been long thought to be a congenital anomaly of vasculogenesis in which arteries and veins form direct connections forming a vascular nidus without an intervening capillary bed or neural tissue. Scattered case reports have described that AVMs may form de novo suggesting they can become an acquired lesion. CASE DESCRIPTION: The current case report describes a patient who presented with new-onset seizures with an initial negative magnetic resonance imaging (MRI) of the brain and subsequently developed an AVM on a MRI 9 years later. CONCLUSION: This case joins a small, but growing body of literature that challenges the notion that all AVMs are congenital.