{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,6]],"date-time":"2026-02-06T04:12:13Z","timestamp":1770351133423,"version":"3.49.0"},"reference-count":16,"publisher":"Journal of Neurosurgery Publishing Group (JNSPG)","issue":"4","license":[{"start":{"date-parts":[[2024,1,22]],"date-time":"2024-01-22T00:00:00Z","timestamp":1705881600000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2024,1,22]]},"abstract":"<jats:sec>\n                    <jats:title>BACKGROUND<\/jats:title>\n                    <jats:p>De novo pseudoaneurysm formation is a rare complication of extracranial-intracranial bypass surgery.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>OBSERVATIONS<\/jats:title>\n                    <jats:p>The authors report the case of a 28-year-old male who presented with new-onset right temporal and occipital ischemia who was found to have bilateral proximal internal carotid artery occlusion with collateral vasculature formation consistent with moyamoya disease. The patient underwent bilateral superficial temporal artery\u2013middle cerebral artery bypasses. A de novo pseudoaneurysm was found at the left-sided bypass distal anastomotic site recipient vessel 1 month after the surgery. The pseudoaneurysm demonstrated a progressive reduction in size and eventual complete involution at 6 months after surgery.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>LESSONS<\/jats:title>\n                    <jats:p>Limited literature reports extracranial-intracranial bypass-associated aneurysms treated primarily with either clipping or resection and reanastomosis. The authors demonstrate, for the first time, a progressively benign natural history course of an extracranial-intracranial bypass distal anastomotic site pseudoaneurysm.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.3171\/case23665","type":"journal-article","created":{"date-parts":[[2024,1,22]],"date-time":"2024-01-22T19:48:56Z","timestamp":1705952936000},"source":"Crossref","is-referenced-by-count":1,"title":["Spontaneous development and involution of a de novo pseudoaneurysm at the superficial temporal artery\u2013middle cerebral artery bypass anastomotic site in a patient with moyamoya disease: illustrative case"],"prefix":"10.3171","volume":"7","author":[{"given":"Kristine","family":"Ravina","sequence":"first","affiliation":[{"name":"Department of Neurosurgery, Carilion Clinic, Virginia Tech School of Medicine, Roanoke, Virginia; and"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Biraj","family":"Patel","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Carilion Clinic, Virginia Tech School of Medicine, Roanoke, Virginia; and"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Benjamin","family":"Yim","sequence":"additional","affiliation":[{"name":"Neurosurgery Division, East Bay Brain and Spine Medical Group, Walnut Creek, California"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1754","reference":[{"issue":"12","key":"b1","series-title":"N Engl J Med.","first-page":"1226","article-title":"Moyamoya disease and moyamoya syndrome","volume":"360","author":"Scott RM","year":"2009","unstructured":"Scott RM, Smith ER Moyamoya disease and moyamoya syndrome. N Engl J Med. 2009;360(12):1226\u20131237."},{"key":"b2","series-title":"World Neurosurg.","first-page":"314","article-title":"Rapid development of an aneurysm at the anastomotic site of a superficial temporal artery to middle cerebral artery bypass: case report and literature review","volume":"128","author":"Potts MB","year":"2019","unstructured":"Potts MB, Horbinski CM, Jahromi BS Rapid development of an aneurysm at the anastomotic site of a superficial temporal artery to middle cerebral artery bypass: case report and literature review. World Neurosurg. 2019;128:314\u2013319."},{"key":"b3","series-title":"World Neurosurg.","first-page":"583.e7","article-title":"De novo aneurysm associated with superficial temporal artery to middle cerebral artery bypass: report of two cases and review of literature","volume":"92","author":"Yokota H","year":"2016","unstructured":"Yokota H, Yokoyama K, Noguchi H De novo aneurysm associated with superficial temporal artery to middle cerebral artery bypass: report of two cases and review of literature. World Neurosurg. 2016;92:583.e7\u2013583.e12."},{"issue":"4","key":"b4","series-title":"J Neurol Surg A Cent Eur Neurosurg.","first-page":"323","article-title":"De novo aneurysm formation at the anastomosis site incidentally detected 2 years after single-barrel STA-MCA bypass surgery: case report and review of the literature","volume":"76","author":"Millesi M","year":"2015","unstructured":"Millesi M, Wang WT, Herta J, Bavinzski G, Knosp E, Gruber A De novo aneurysm formation at the anastomosis site incidentally detected 2 years after single-barrel STA-MCA bypass surgery: case report and review of the literature. J Neurol Surg A Cent Eur Neurosurg. 2015;76(4):323\u2013327."},{"issue":"5","key":"b5","series-title":"Br J Neurosurg.","first-page":"548","article-title":"Graft aneurysm complicating an extracranial-intracranial bypass","volume":"23","author":"Marcus HJ","year":"2009","unstructured":"Marcus HJ, Patel HC, Kirkpatrick PJ Graft aneurysm complicating an extracranial-intracranial bypass. Br J Neurosurg. 2009;23(5):548\u2013550."},{"issue":"4","key":"b6","series-title":"Clin Neurol Neurosurg.","first-page":"457","article-title":"De novo ruptured aneurysm at the site of anastomosis after superficial temporal artery-middle cerebral artery anastomosis\u2014case report and literature review","volume":"115","author":"Kawahara I","year":"2013","unstructured":"Kawahara I, Morofuji Y, Tsutsumi K, et\u00a0al. De novo ruptured aneurysm at the site of anastomosis after superficial temporal artery-middle cerebral artery anastomosis\u2014case report and literature review. Clin Neurol Neurosurg. 2013;115(4):457\u2013460."},{"issue":"1","key":"b7","series-title":"Surg Neurol Int.","first-page":"41","article-title":"Repeated de novo aneurysm formation after anastomotic surgery: Potential risk of genetic variant RNF213 c.14576G>A","volume":"6","author":"Fukushima Y","year":"2015","unstructured":"Fukushima Y, Miyawaki S, Inoue T, et\u00a0al. Repeated de novo aneurysm formation after anastomotic surgery: Potential risk of genetic variant RNF213 c.14576G>A. Surg Neurol Int. 2015;6(1):41."},{"issue":"4","key":"b8","series-title":"Microsurgery.","first-page":"293","article-title":"Microvascular anastomotic aneurysms in the clinical setting: case report and review of the literature","volume":"29","author":"Lykoudis EG","year":"2009","unstructured":"Lykoudis EG, Papanikolaou GE, Katsikeris NF Microvascular anastomotic aneurysms in the clinical setting: case report and review of the literature. Microsurgery. 2009;29(4):293\u2013298."},{"issue":"12","key":"b1","series-title":"N Engl J Med.","first-page":"1226","article-title":"Moyamoya disease and moyamoya syndrome","volume":"360","author":"Scott RM","year":"2009","unstructured":"Scott RM, Smith ER Moyamoya disease and moyamoya syndrome. N Engl J Med. 2009;360(12):1226\u20131237."},{"key":"b2","series-title":"World Neurosurg.","first-page":"314","article-title":"Rapid development of an aneurysm at the anastomotic site of a superficial temporal artery to middle cerebral artery bypass: case report and literature review","volume":"128","author":"Potts MB","year":"2019","unstructured":"Potts MB, Horbinski CM, Jahromi BS Rapid development of an aneurysm at the anastomotic site of a superficial temporal artery to middle cerebral artery bypass: case report and literature review. World Neurosurg. 2019;128:314\u2013319."},{"key":"b3","series-title":"World Neurosurg.","first-page":"583.e7","article-title":"De novo aneurysm associated with superficial temporal artery to middle cerebral artery bypass: report of two cases and review of literature","volume":"92","author":"Yokota H","year":"2016","unstructured":"Yokota H, Yokoyama K, Noguchi H De novo aneurysm associated with superficial temporal artery to middle cerebral artery bypass: report of two cases and review of literature. World Neurosurg. 2016;92:583.e7\u2013583.e12."},{"issue":"4","key":"b4","series-title":"J Neurol Surg A Cent Eur Neurosurg.","first-page":"323","article-title":"De novo aneurysm formation at the anastomosis site incidentally detected 2 years after single-barrel STA-MCA bypass surgery: case report and review of the literature","volume":"76","author":"Millesi M","year":"2015","unstructured":"Millesi M, Wang WT, Herta J, Bavinzski G, Knosp E, Gruber A De novo aneurysm formation at the anastomosis site incidentally detected 2 years after single-barrel STA-MCA bypass surgery: case report and review of the literature. J Neurol Surg A Cent Eur Neurosurg. 2015;76(4):323\u2013327."},{"issue":"5","key":"b5","series-title":"Br J Neurosurg.","first-page":"548","article-title":"Graft aneurysm complicating an extracranial-intracranial bypass","volume":"23","author":"Marcus HJ","year":"2009","unstructured":"Marcus HJ, Patel HC, Kirkpatrick PJ Graft aneurysm complicating an extracranial-intracranial bypass. Br J Neurosurg. 2009;23(5):548\u2013550."},{"issue":"4","key":"b6","series-title":"Clin Neurol Neurosurg.","first-page":"457","article-title":"De novo ruptured aneurysm at the site of anastomosis after superficial temporal artery-middle cerebral artery anastomosis\u2014case report and literature review","volume":"115","author":"Kawahara I","year":"2013","unstructured":"Kawahara I, Morofuji Y, Tsutsumi K, et\u00a0al. De novo ruptured aneurysm at the site of anastomosis after superficial temporal artery-middle cerebral artery anastomosis\u2014case report and literature review. Clin Neurol Neurosurg. 2013;115(4):457\u2013460."},{"issue":"1","key":"b7","series-title":"Surg Neurol Int.","first-page":"41","article-title":"Repeated de novo aneurysm formation after anastomotic surgery: Potential risk of genetic variant RNF213 c.14576G>A","volume":"6","author":"Fukushima Y","year":"2015","unstructured":"Fukushima Y, Miyawaki S, Inoue T, et\u00a0al. Repeated de novo aneurysm formation after anastomotic surgery: Potential risk of genetic variant RNF213 c.14576G>A. Surg Neurol Int. 2015;6(1):41."},{"issue":"4","key":"b8","series-title":"Microsurgery.","first-page":"293","article-title":"Microvascular anastomotic aneurysms in the clinical setting: case report and review of the literature","volume":"29","author":"Lykoudis EG","year":"2009","unstructured":"Lykoudis EG, Papanikolaou GE, Katsikeris NF Microvascular anastomotic aneurysms in the clinical setting: case report and review of the literature. Microsurgery. 2009;29(4):293\u2013298."}],"container-title":["Journal of Neurosurgery: Case Lessons"],"original-title":[],"link":[{"URL":"https:\/\/thejns.org\/view\/journals\/j-neurosurg-case-lessons\/7\/4\/article-CASE23665.xml","content-type":"text\/html","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/thejns.org\/downloadpdf\/journals\/j-neurosurg-case-lessons\/7\/4\/article-CASE23665.xml","content-type":"text\/html","content-version":"vor","intended-application":"syndication"},{"URL":"https:\/\/thejns.org\/downloadpdf\/journals\/j-neurosurg-case-lessons\/7\/4\/article-CASE23665.xml","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,2,5]],"date-time":"2026-02-05T14:26:41Z","timestamp":1770301601000},"score":1,"resource":{"primary":{"URL":"https:\/\/thejns.org\/view\/journals\/j-neurosurg-case-lessons\/7\/4\/article-CASE23665.xml"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2024,1,22]]},"references-count":16,"journal-issue":{"issue":"4"},"URL":"https:\/\/doi.org\/10.3171\/case23665","relation":{},"ISSN":["2694-1902"],"issn-type":[{"value":"2694-1902","type":"electronic"}],"subject":[],"published":{"date-parts":[[2024,1,22]]}}}