Objective: To describe a frameless stereotactic technique used to resect cerebral arteriovenous malformations (AVMs) and to analyze the outcomes in surgical resection in Neurosurgery department of Cho Ray hospital. Methods: Data for 52 consecutive patients with surgical resection of AVMs applying the frameless stereotaxy, Steath Station Treon Plus, (Metronic, USA), were prospectively reviewed from 2007 to 2009.