Spontaneous Superficial Temporal Artery Aneurysm with Intracranial Cerebral Aneurysm: A Case Report

• Published in: Japanese Journal of Vascular Surgery Vol. 32; no. 2; pp. 101 - 104
• Main Authors: Ishida, Narihiro, Kumada, Yoshitaka, Mori, Akihiro, Nakamura, Yasuhito, Kawai, Norikazu
• Format: Journal Article
• Language: Japanese
• Published: JAPANESE SOCIETY FOR VASCULAR SURGERY 23.03.2023; 特定非営利活動法人 日本血管外科学会
• Subjects: intracranial cerebral aneurysm; spontaneous superficial temporal artery aneurysm; superficial temporal artery aneurysm; true superficial temporal artery aneurysm; 浅側頭動脈瘤; 特発性浅側頭動脈瘤; 真性浅側頭動脈瘤; 脳動脈瘤
• ISSN: 0918-6778; 1881-767X
• DOI: 10.11401/jsvs.22-00096

Superficial temporal artery (STA) aneurysms are rare, and in most cases, represent pseudoaneurysms due to trauma. Non-traumatic spontaneous STA aneurysms are extremely rare, and only few cases of their association with intracranial artery aneurysms have been reported. Herein, we report a case of a non-traumatic true STA aneurysm concurrent with an intracranial artery aneurysm. The patient was a 74-year-old woman who presented with a complaint of a pulsatile mass in the left anterior auricular region that had been present for several months. She had no history of head trauma. Doppler ultrasonography and magnetic resonance imaging revealed a left STA aneurysm and a 2 mm aneurysm of the right anterior cerebral artery. The left STA aneurysm was surgically treated by aneurysm resection and arterial anastomosis under local anesthesia. The patient’s postoperative course was unremarkable. Pathohistological analysis of the resected aneurysm showed preserved three-layer arterial wall, fibrous thickening of the tunica media, and partially disrupted and obscured elastic lamina. Based on these findings and the lack of trauma history, we established a diagnosis of a true spontaneous aneurysm. At the 6 month follow-up, the patient’s condition was good, and she will continue to be followed up for the right anterior cerebral artery aneurysm.