INTRACRANIAL ARTERIOVENOUS MALFORMATIONS

　I am grateful to Dr．　Mitsuno, your President, for　the invitation to be a guest speaker at this meeting　of the Japanese Neurosurgical Society．　I consider it　an honor and have accepted the invitation with due　humility．　Both Mrs．　Poppen and I have been able　to renew our acquaintances with many of you．　It　has also given us the privilege of seeing your lovely　country an opportunity that both of us have anti—cipated with considerable enthusiasm．

　I wish to present to you a review of the intra—cranial arteriovenous malformations that I have come　in contact with in the past 30 years at the Lahey　Clinic．　This group of vascular malformations is of　interest both because of the number and also because　of the long-term survival of the earlier surgically　treated patients．　In addition, some of the patients　were treated before contrast media were routinely　used to give the surgeon specific and adequate infor—mation regarding the lesion that he was to come in　contact with．