Fig. 1From: Changes in treatment strategy over time for arteriovenous malformation in a Japanese high-volume centerThe proportions of each treatment for each S–M grade of AVM in the first and second periods of our study: grade I (a), grade II (b), grade III (c), grade IV (d), and grade V (e). S: microsurgery, E: endovascular embolization, R: stereotactic radiosurgery, M: medical treatmentBack to article page