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Radiology Forum
June 2000

Imaging Quiz Case 1

Arch Otolaryngol Head Neck Surg. 2000;126(6):795. doi:

Aneurysms of the carotid artery are uncommon, usually being associated with aneurysms at other sites and resulting from large-artery medial degeneration.1 Mycotic aneurysms of the carotid artery are exceedingly rare, with fewer than 30 cases reported in the literature, and have historically been associated with trauma, syphilitic infection, or other contiguous infections of the upper respiratory tract. The causative organisms most frequently involved are Staphylococcusand Streptococcus; Klebsiella pneumoniae, Escherichia coli, Yersinia enterocolitica, Proteus mirabilis, Corynebacteriumspecies, and Salmonellaspecies have also been reported.2 Infection with Salmonellaspecies is exceptionally rare, with only 7 previous cases having been reported in the literature, to our knowledge.3

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