Table 1.

Patient data, middle cerebral artery bifurcation aneurysm characteristic, surgical complications, and outcomes

Case number	Sex/age (year)	Rupture	WFNS grade/modified fisher grade	Aneurysm size (mm)	Aneurysm projection	M1 curvature	MCAB located above sylvian line	Early exposure of distal M1	Premature rupture	Complete aneurysm obliteration	Postoperative cerebral contusion	Lenticulostriate artery injury	Postoperative complications	New postoperative deficits	GOS at 3 months
1	Male/57	No	-/0	6	Anterior	Posterior	No	Yes	No	Yes	No	No	No	No	5
2	Female/67	Yes	1/3	4	Anterior	Posterosuperior	No	Yes	No	Yes	No	No	No	No	5
3	Female/48	No	-/0	4	Anteroinferior	Posterosuperior	No	Yes	No	Yes	No	No	No	No	5
4	Female/68	Yes	1/3	5	AL	Posterosuperior	No	Yes	No	Yes	No	No	No	No	5
5	Female/71	Yes	1/3	5	Inferior	-	No	Yes	No	Yes	No	No	No	No	5
6	Male/55	Yes	5/3	3	Anterior	Posterior	No	Yes	No	Yes	Yes	No	Vasospasm, hemorrhagic infarct	Right hemiparesis, aphasia	3
7	Male/46	Yes	1/3	4	Anteroinferior	Posterosuperior	No	Yes	No	Yes	No	No	No	No	5
8	Female/36	Yes	1/3	4	Anterior	Posterior	No	Yes	No	Yes	No	No	Vasospasm	Left hemiparesis	5
9	Male/47	Yes	4/3	6	Anterior	Posterior	Yes	No	Yes	Yes	No	No	Vasospasm	Right hemiparesis	5
10	Female/64	Yes	2/3	3.5	Anteroinferior	Posterior	No	Yes	No	Yes	No	No	No	No	5
11	Female/50	Yes	1/3	4	Inferior	Posterosuperior	No	Yes	No	Yes	No	No	No	No	5
12	Male/30	Yes	1/1	3	Anterior	Posterior	No	Yes	No	Yes	No	No	No	No	5
13	Female/62	No	-*/0	3	Anteroinferior	Posterosuperior	No	Yes	No	Yes	No	No	No	No	3

*Preoperative paraparesis from the previous surgery. M1 – The first segment of middle cerebral artery; MCAB – Middle cerebral artery bifurcation; WFNS – World Federation of Neurosurgical Societies; GOS – Glasgow outcome score; AL – Anterolateral