Arterial outpouching affecting only part of arterial circumference
Lacks internal elastic lamina ± tunica media
"Wide-neck" aneurysm
Neck size ≥ 4 mm or
Dome:neck ratio < 2
IMAGING
General Features
CT Findings
MR Findings
Angiographic Findings
Imaging Recommendations
DIFFERENTIAL DIAGNOSIS
PATHOLOGY
General Features
Gross Pathologic & Surgical Features
Microscopic Features
CLINICAL ISSUES
Presentation
Demographics
Natural History & Prognosis
Treatment
DIAGNOSTIC CHECKLIST
Consider
Image Interpretation Pearls
Selected References
Castle-Kirszbaum M et al: Four-dimensional magnetic resonance imaging assessment of intracranial aneurysms: a state-of-the-art review. Neurosurgery. ePub, 2020
Hernández-Durán S et al: Is the unruptured intracranial aneurysm treatment score (UIATS) sensitive enough to detect aneurysms at risk of rupture? Neurosurg Rev. ePub, 2020
Malhotra A et al: Management of small, unruptured intracranial aneurysms. World Neurosurg. 135:379-80, 2020
Pierot L et al: Intraoperative complications of endovascular treatment of intracranial aneurysms with coiling or balloon-assisted coiling in a prospective multicenter cohort of 1088 participants: analysis of recanalization after endovascular treatment of intracranial aneurysm (ARETA) Study. Radiology. 191842, 2020
Shi Z et al: Artificial intelligence in the management of intracranial aneurysms: current status and future perspectives. AJNR Am J Neuroradiol. 41(3):373-9, 2020
Warchol-Celinska E et al: Systematic and multidisciplinary evaluation of fibromuscular dysplasia patients reveals high prevalence of previously undetected fibromuscular dysplasia lesions and affects clinical decisions: the ARCADIA-POL study. Hypertension. 75(4):1102-9, 2020
Dmytriw AA et al: On flow diversion: the changing landscape of intracerebral aneurysm management. AJNR Am J Neuroradiol. 40(4):591-600, 2019
Kern KC et al: Vessel wall imaging of cerebrovascular disorders. Curr Treat Options Cardiovasc Med. 21(11):65, 2019
Samaniego EA et al: Vessel wall imaging in intracranial aneurysms. J Neurointerv Surg. 11(11):1105-12, 2019
Texakalidis P et al: Aneurysm formation, growth, and rupture: the biology and physics of cerebral aneurysms. World Neurosurg. 130:277-84, 2019
Signorelli F et al: Hemodynamic stress, inflammation, and intracranial aneurysm development and rupture: a systematic review. World Neurosurg. 115:234-44, 2018
Tulamo R et al: Inflammatory changes in the aneurysm wall: a review. J Neurointerv Surg. 10(Suppl 1):i58-i67, 2018
Malhotra A et al: Growth and rupture risk of small unruptured intracranial aneurysms: a systematic review. Ann Intern Med. 167(1):26-33, 2017
Hu P et al: Wall enhancement on high-resolution magnetic resonance imaging may predict an unsteady state of an intracranial saccular aneurysm. Neuroradiology. 58(10):979-85, 2016
Related Anatomy
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Related Differential Diagnoses
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References
Tables
Tables
KEY FACTS
Terminology
Imaging
Top Differential Diagnoses
Clinical Issues
TERMINOLOGY
Abbreviations
Intracranial saccular aneurysm (SA)
Synonyms
Berry aneurysm, true aneurysm
Definitions
Arterial outpouching affecting only part of arterial circumference
Lacks internal elastic lamina ± tunica media
"Wide-neck" aneurysm
Neck size ≥ 4 mm or
Dome:neck ratio < 2
IMAGING
General Features
CT Findings
MR Findings
Angiographic Findings
Imaging Recommendations
DIFFERENTIAL DIAGNOSIS
PATHOLOGY
General Features
Gross Pathologic & Surgical Features
Microscopic Features
CLINICAL ISSUES
Presentation
Demographics
Natural History & Prognosis
Treatment
DIAGNOSTIC CHECKLIST
Consider
Image Interpretation Pearls
Selected References
Castle-Kirszbaum M et al: Four-dimensional magnetic resonance imaging assessment of intracranial aneurysms: a state-of-the-art review. Neurosurgery. ePub, 2020
Hernández-Durán S et al: Is the unruptured intracranial aneurysm treatment score (UIATS) sensitive enough to detect aneurysms at risk of rupture? Neurosurg Rev. ePub, 2020
Malhotra A et al: Management of small, unruptured intracranial aneurysms. World Neurosurg. 135:379-80, 2020
Pierot L et al: Intraoperative complications of endovascular treatment of intracranial aneurysms with coiling or balloon-assisted coiling in a prospective multicenter cohort of 1088 participants: analysis of recanalization after endovascular treatment of intracranial aneurysm (ARETA) Study. Radiology. 191842, 2020
Shi Z et al: Artificial intelligence in the management of intracranial aneurysms: current status and future perspectives. AJNR Am J Neuroradiol. 41(3):373-9, 2020
Warchol-Celinska E et al: Systematic and multidisciplinary evaluation of fibromuscular dysplasia patients reveals high prevalence of previously undetected fibromuscular dysplasia lesions and affects clinical decisions: the ARCADIA-POL study. Hypertension. 75(4):1102-9, 2020
Dmytriw AA et al: On flow diversion: the changing landscape of intracerebral aneurysm management. AJNR Am J Neuroradiol. 40(4):591-600, 2019
Kern KC et al: Vessel wall imaging of cerebrovascular disorders. Curr Treat Options Cardiovasc Med. 21(11):65, 2019
Samaniego EA et al: Vessel wall imaging in intracranial aneurysms. J Neurointerv Surg. 11(11):1105-12, 2019
Texakalidis P et al: Aneurysm formation, growth, and rupture: the biology and physics of cerebral aneurysms. World Neurosurg. 130:277-84, 2019
Signorelli F et al: Hemodynamic stress, inflammation, and intracranial aneurysm development and rupture: a systematic review. World Neurosurg. 115:234-44, 2018
Tulamo R et al: Inflammatory changes in the aneurysm wall: a review. J Neurointerv Surg. 10(Suppl 1):i58-i67, 2018
Malhotra A et al: Growth and rupture risk of small unruptured intracranial aneurysms: a systematic review. Ann Intern Med. 167(1):26-33, 2017
Hu P et al: Wall enhancement on high-resolution magnetic resonance imaging may predict an unsteady state of an intracranial saccular aneurysm. Neuroradiology. 58(10):979-85, 2016
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