The report concerns a 36-year-old patient with left temporal arteriovenous malformation (AVM). After interdisciplinary consultation, combined treatment with endovascular embolization and subsequent stereotactic irradiation was recommended. 2 h following embolization, which was complication-free, there was left temporal bleeding with ventricular tamponade. Once the patient had survived the acute phase with application of external drainage and later implantation of a shunt system, he was left with an organic brain syndrome. His lawyer brought suit against the clinic for improper treatment and inadequate information. The court rejected the suit as without foundation, basing its reasoning essentially on the statements of the neuroradiologic expert.