This case is a 32 year-old woman who had persistent right sided headaches. She had a work-up done including an MRI of the brain. The MRI revealed that she had an arteriovenous malformation (AVM) of the right posterior temporal lobe going into the deep white matter. An arteriovenous malformation is an abnormal connection between arteries and veins, bypassing the capillary system.
Arteriovenous malformation can be found anywhere arteries and veins operate but occur most often in the brain or spine. In general, brain AVMs are rare and affect less than 1 percent of the population.
They usually cause intense pain or bleeding and can lead to other serious medical problems like brain damage or stroke.