Table 1.

Clinical Features of Twelve Mirror Aneurysms Prior to Rupture

No.	Age	Sex	HTN	DM	Smoking	Symptoms	Location	Days	Side	FUT
1	55	Male	Yes	No	Yes	ONP	C7	3	L	3
2	46	Female	No	No	No	ONP	C7	5	R	6
3	68	Female	Yes	No	No	ONP	C7	5	L	8
4	70	Male	No	Yes	No	ONP	C7	4	R	9
5	65	Female	No	No	No	Headache	C7	3	L	12
6	58	Male	No	No	Yes	ONP	C7	3	R	5
7	62	Female	Yes	Yes	No	ONP	C7	2	R	6
8	57	Male	Yes	No	Yes	Headache	C6	4	L	4
9	44	Female	Yes	No	No	Episodic dizziness	C6	5	R	3
10	65	Female	No	Yes	No	Headache, dizziness	C6	3	R	6
11	67	Male	Yes	No	Yes	Incidental	MCA	2	L	15
12	59	Female	Yes	No	No	Headache	MCA	4	R	6

Abbreviations: HTN, hypertension; DM, diabetes mellitus; L/R, left/right; ONP, oculomotor nerve palsy; Side, the location of aneurysm prior to the rupture of mirror aneurysm; FUT, follow-up time, the monitoring period of the unruptured one of mirror aneurysms; Days, interval time between hospitalization and subarachnoid haemorrhage or the interval time between onset of ONP and the DSA was performed; MCA, middle cerebral artery; The Bouthillier classification of internal carotid artery segments: C6, ophthalmic; C7, communicating.