Fig. 2.

Case of AVM with newly developed aneurysm after radiosurgery. A 21-year-old female patient with previous microsurgery for AVM nidus presented with intracranial hemorrhage on right frontal lobe on CT scan (A). On angiographic examination (B). remained nidus is detected and treated by Gamma knife (marginal dose 22 Gy). On follow-up angiographic examination, nidus of AVM is obliterated but de novo aneurysm (arrow) is detected at the previous feeding artery (C). This aneurysm was treated with GDC embolization and demonstrating of complete obliteration of nidus and coiled aneurysm after 2 years follow-up (D). AVM : arteriovenous malformation, GDC : Guglielmi detachable coil.