title: Avid FDG uptake in a rapidly enlarging common carotid artery mycotic aneurysm, mimicking lymphadenopathy.
abstract: We present a case of mycotic pseudoaneurysm of the right common carotid artery, which demonstrated avid FDG uptake mimicking lymphomatous involvement on a non-contrast FDG-PET/CT scan. Within 6 days of initial presentation, the pseudoaneurysm enlarged rapidly and required emergent surgical repair. To the best of our knowledge, this is the first reported case both of a PET-positive non-aortic aneurysm and a rapidly enlarging common carotid artery pseudoaneurysm. This case highlights the importance of contrast administration with PET/CT and the heralding nature of FDG uptake in an aneurysm wall for impending aneurysm rupture.
authors.affiliation: Department of Radiology, The Johns Hopkins Hospital, Baltimore, MD 21287, USA. dboneka1@jhmi.edu
authors.forename: David
authors.initials: D
authors.lastname: Bonekamp
authors.forename: Joshua D
authors.initials: JD
authors.lastname: Smith
authors.forename: Nafi
authors.initials: N
authors.lastname: Aygun
mesh_terms: D017541:Aneurysm, False / Q000175:diagnosis; D000785:Aneurysm, Infected / Q000175:diagnosis* / Q000473:pathology; D003937:Diagnosis, Differential; D019788:Fluorodeoxyglucose F18 / Q000493:pharmacokinetics; D006801:Humans; D008206:Lymphatic Diseases / Q000175:diagnosis*; D008297:Male; D008875:Middle Aged; D019275:Radiopharmaceuticals / Q000493:pharmacokinetics
chemical_list: D019275:Radiopharmaceuticals; D019788:Fluorodeoxyglucose F18