Table 1.

Characteristics of four patients with ruptured VA dissecting aneurysm involving the PICA origin

Case	Age	Sex	H&H grade	Side	Previous treatment	Treatment	Treatment day post SAH (Days)	Procedural complication	Post-procedural ischemic lesion	Graft patency	Aneurysm obliteration	mRS 3 months	Rebleeding	Follow-up period (year)
1	43	M	III	Lt.	Lt. VA proximal occlusion with coil	Lt. OA-PICA anastomosis, Lt. PICA origin clip ligation	191	None	None	Good	Complete	1	–	14
2	52	M	I	Rt.	None	Rt. OA-PICA anastomosis, Rt. PICA origin clip ligation, Rt. VA proximal clip ligation	14	None	None	Good	Complete	0	–	10
3	60	M	IV	Lt.	None	Lt. OA-PICA anastomosis, Lt. PICA origin clip ligation, Lt. VA proximal clip ligation	2	None	None	Good	Complete	3	–	3
4	54	M	IV	Rt.	None	Rt. OA-PICA anastomosis, Rt. PICA origin clip ligation, Rt. VA proximal clip ligation	14	None	None	Good	Complete	4	–	1

F: female, H&H: Hunt and Hess grade, lt.: left, M: male, mRS: modified Rankin Scale, OA: occipital artery, PICA: posterior inferior cerebellar artery, rt.: right, SAH: subarachnoid hemorrhage, VA: vertebral artery.