“…Mycotic carotid artery aneurysms, both intracranial and extracranial, are highly unusual lesions and have been associated with bacterial endocarditis, intravenous drug abuse, dental infection, ingested foreign bodies, and bacterial sinusitis. 1 , 10 , 11 , 12 , 13 The usual causative organisms of mycotic aneurysms include Staphylococcus aureus , Escherichia coli , and Salmonella species, although Streptococcus and Klebsiella species have also been implicated. 1 , 2 , 3 , 14 , 15 , 16 Although historically more prevalent, M tuberculosis has been a rare causative pathogen in the formation of mycotic carotid aneurysms for the last century, with only four previous cases reported in literature.…”