title: De novo aneurysm of the anterior communicating artery presenting with subarachnoid hemorrhage 7 years after initial cryptogenic subarachnoid hemorrhage: a case report and review of the literature.
abstract: Spontaneous subarachnoid hemorrhage (SAH) is usually caused by a ruptured cerebral aneurysm. Despite the use of initial four-vessel cerebral digital subtraction angiography (DSA), 15 % of all cases remain idiopathic. According to the initial computed tomographic scan, the spontaneous SAH can be divided into a perimesencephalic group associated with a benign nature and a nonperimesencephalic group with a similar clinical course as aneurysmal SAH. We present a case of a 49-year-old man with a de novo aneurysm formation of the anterior communicating artery with SAH 7 years after initial cryptogenic nonperimesencephalic SAH. This observation suggests that in some cases, long-term angiographic studies might be justified.
authors.affiliation: Department of Neuroradiology, University Medical Center Mannheim, University of Heidelberg, Mannheim, Germany, holger.wenz@umm.de.
authors.forename: H
authors.initials: H
authors.lastname: Wenz
authors.forename: M-M
authors.initials: MM
authors.lastname: Al Mahdi
authors.forename: G
authors.initials: G
authors.lastname: Ehrlich
authors.forename: J
authors.initials: J
authors.lastname: Scharf
authors.forename: P
authors.initials: P
authors.lastname: Schmiedek
authors.forename: M
authors.initials: M
authors.lastname: Seiz
mesh_terms: D002533:Cerebral Angiography / Q000379:methods*; D003937:Diagnosis, Differential; D006801:Humans; D002532:Intracranial Aneurysm / Q000150:complications* / Q000175:diagnosis*; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D013345:Subarachnoid Hemorrhage / Q000175:diagnosis* / Q000209:etiology*