{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,4]],"date-time":"2026-08-04T01:39:57Z","timestamp":1785807597646,"version":"3.56.0"},"reference-count":21,"publisher":"Journal of Neurosurgery Publishing Group (JNSPG)","issue":"4","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2004,10]]},"abstract":"<jats:p content-type=\"fine-print\">\u2713 The authors present a case in which a posterior communicating artery (PCoA) infundibulum progressed into an aneurysm in a patient with Alagille syndrome (arteriohepatic dysplasia). The 3-mm PCoA infundibulum had been noted on angiography studies obtained 5 years earlier, prior to clip occlusion of a basilar tip aneurysm. Recently, the patient presented to the emergency department with the sudden onset of headache and decreased mental status. A computerized tomography scan of the head with three-dimensional angiography revealed no gross subarachnoid hemorrhage, but did demonstrate a 5-mm PCoA aneurysm. Lumbar puncture demonstrated xanthochromia and a large quantity of red blood cells. The patient underwent open surgery for aneurysm clip occlusion and obtained a good recovery.<\/jats:p>\n<jats:p content-type=\"fine-print\">This case illustrates the small but growing number of examples of infundibulum progression. It also indicates the need for a close follow up in patients with congenital abnormalities that may pose an increased risk for what has traditionally been considered a benign lesion.<\/jats:p>","DOI":"10.3171\/jns.2004.101.4.0694","type":"journal-article","created":{"date-parts":[[2009,5,13]],"date-time":"2009-05-13T18:00:38Z","timestamp":1242237638000},"page":"694-696","source":"Crossref","is-referenced-by-count":23,"title":["Progression of a posterior communicating artery infundibulum into an aneurysm in a patient with Alagille syndrome"],"prefix":"10.3171","volume":"101","author":[{"given":"John A.","family":"Cowan","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Garni","family":"Barkhoudarian","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lynda J. S.","family":"Yang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"B. 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