A case of idiopathic extracranial carotid artery pseudoaneurysm with a rare clinical course and pathological features. Issue 3 (1st February 2021)

• Record Type: Journal Article
• Authors: Nomura, Shunsuke; Yoneyama, Taku; Kawashima, Akitsugu; Yamaguchi, Koji; Ishikawa, Tatsuya; Okada, Yoshikazu; Shibata, Noriyuki; Kawamata, Takakazu
• Is Part Of: Neuropathology. Volume 41:Issue 3(2021)
• Page Start: 191
• Page End: 195
• Publication Date: 2021-02-01
• Subjects: clinical course -- extracranial carotid artery -- pathology -- pseudoaneurysm -- ruptured aneurysm; Nervous system -- Diseases -- Periodicals; Nervous system -- Pathophysiology -- Periodicals; 616.8047
• DOI: 10.1111/neup.12719
• Languages: English
• ISSNs: 0919-6544

Abstract

Abstract : Extracranial carotid artery aneurysms (ECAAs) are rare, with the etiology mainly classified as degeneration or dissection. Pseudoaneurysms in the region are even rarer and are seen following trauma, iatrogenic injury, or infection. We report a case of extracranial carotid artery pseudoaneurysm (pseudo‐ECAA) with a rare clinical course and pathological features. A 58‐year‐old man presented with swelling and purpura on the left side of his neck after sneezing. Radiological examinations suggested a ruptured left common carotid artery aneurysm. The operative findings were consistent with a pseudoaneurysm. Pathological examination revealed disarrangement and degeneration of smooth muscle fibers in the media, in addition to scattered foci of mucoid accumulation and irregular‐shaped cavitation in the medial extracellular matrix, raising the possibility of an intrinsic dysfunction of the vascular wall in the pathological process of pseudoaneurysm formation.