Abstract
Infectious intracranial aneurysms (IIAs) are rare cerebrovascular lesions caused by the spread of microbial infection to the arterial vessel wall leading to weakening and aneurysmal dilatation. IIAs were initially described by Osler in 1885 as aneurysmal complications of infective endocarditis (IE) and were called “mycotic aneurysms” (MA). The term “mycotic” was not used to indicate a fungal etiology since MA are mostly caused by bacterial infections; rather, it described the appearance of these aneurysms that mimic fungal vegetation. Due to the rare nature of the disease, studies on IIAs are limited to case reports, case series, and retrospective studies that are not sufficient to draw generalizable conclusions on the epidemiology, management, and outcomes of IIAs. However, it is anticipated that IIAs account for 0.5–6.5% of all aneurysms and are associated with high risk of rupture and mortality. Treatment of IIAs may range from conservative medical management with antibiotic therapy and close monitoring, to endovascular embolization, to microsurgical clipping or excision of the aneurysms. In this chapter, we review the pathophysiology, epidemiology, and management of IIAs.
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Authors acknowledge support from the American Heart Association to A.A. (15PRE25250009).
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Alawieh, A., Spiotta, A.M. (2019). Infectious Intracranial Aneurysms: Epidemiology, Pathophysiology, and Management. In: Spiotta, A., Turner, R., Chaudry, M., Turk, A. (eds) Management of Cerebrovascular Disorders. Springer, Cham. https://doi.org/10.1007/978-3-319-99016-3_16
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