Article Figures & Data
Figures
- Fig 1.
A 66-year-old male patient presented with unstable angina. He had mild right hemiparesis due to a stroke 8 years before, and he had a 2-month history of transient left hemiparesis. His risk factors included diabetes mellitus and hypertension.
A, Lateral right common carotid arteriogram shows severe stenosis in the proximal cervical segment of the right internal carotid artery.
B, Anteroposterior view shows no significant stenosis in the intracranial vessels except for mild luminal irregularities.
C and D, Left common carotid arteriograms shows mild narrowing of the carotid bulb portion without significant stenosis in the intracranial vessels.
- Fig 2.
A 43-year-old male patient presented with repeated right hemiparesis due to a transient ischemic attack. He had a 15 pack-year smoking history.
A, Left carotid bulb is normal.
B, Intracranial angiogram shows severe stenosis (arrow) of the left M1 segment corresponding to the patient’s symptoms.
Tables
Location No. of Lesions Intracranial arteries 203 (52) Anterior circulation 114 M1 58 A1 24 ICA 15 M2 10 A2 6 ACHA 1 Posterior circulation 89 VA 27 P1–3 23 PICA 14 BA 12 VBJ 7 AICA 4 P4 1 SCA 1 Extracranial arteries 186 (48) Anterior circulation 117 ICA 116 CCA 1 Posterior circulation 69 VA 61 SA 8 Total 389 Note.—Data in parentheses are percentages. M1 indicates the horizontal segment of middle cerebral artery; A1, horizontal segment of anterior cerebral artery; ICA, internal carotid artery; M2, vertical segment of middle cerebral artery; A2, vertical segment of anterior cerebral artery; ACHA, anterior choroidal artery; VA, vertebral artery; P1–3, area from precommunicating segment to the quadrigeminal segment of posterior cerebral artery; PICA, posterior inferior cerebellar artery; BA = basilar artery; VBJ, vertebrobasilar junction; AICA, anterior inferior cerebellar artery; P4 = cortical branch of posterior cerebral artery; SCA, superior cerebellar artery; CCA, common carotid artery; SA, subclavian artery.
Group and Location No. of Lesions Single stenosis 56 Intracranial 37 (66) M1 16 PICA 7 VA 4 P1–3 4 M2 2 A2 1 ACHA 1 BA 1 AICA 1 Extracranial 19 (34) ICA 14 VA 4 SA 1 Multiple stenosis 333 Intracranial 166 (50) M1 42 A1 24 VA 23 P1–3 19 ICA 15 BA 11 M2 8 A2 5 VBJ 7 PICA 7 AICA 3 P4 1 SCA 1 Extracranial 167 (50) ICA 102 VA 57 SA 7 CCA 1 Note.—Data in parentheses are percentages. Abbreviations are defined in the footnote for Table 1.
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