This report concerns a 41-year-old female patient with a huge meningioma which was preoperatively embolized with polyvinyl alcohol particles (PVA, 100-300 μm) via the left middle meningeal artery. Dangerous vascular anastomoses were not previously recognized in a superselective angiography. Aphasia and hemiparesis on the right side occurred immediately after the embolization. A cerebral infarct was seen in the region of the left pericallosal artery. The patient applied to the fact-finding board for medical liability and a neuroradiologic opinion was requested. The board came to the conclusion that no incorrect medical treatment had been carried out.