title: Aneurysm at origin of duplicated middle cerebral artery associated with another aneurysm.
abstract: BACKGROUND
  A duplicated middle cerebral artery (DMCA) is a rare vessel anomaly. Aneurysms at the origin of DMCA have been reported.
  
  
  METHODS
  We report 2 cases of aneurysms at the origin of DMCA accompanied by aneurysms at different sites. Each case of ruptured and unruptured aneurysm at the DMCA origin was associated with an unruptured aneurysm at the ipsilateral internal carotid artery and a ruptured one at the ipsilateral MCA, respectively. The aneurysms were clipped successfully in both patients.
  
  
  CONCLUSIONS
  In cases of DMCA aneurysm associated with an aneurysm at another site, either aneurysm has a high risk of rupture. In such a case, radical treatment is necessary.
authors.affiliation: Department of Neurosurgery, Yokohama Sakae Kyosai Hospital, Sakae-ku, Yokohama 247-8581, Japan.
authors.forename: Yu
authors.initials: Y
authors.lastname: Iida
authors.affiliation: Department of Neurosurgery, Yokohama Sakae Kyosai Hospital, Sakae-ku, Yokohama 247-8581, Japan.
authors.forename: Akira
authors.initials: A
authors.lastname: Tamase
authors.affiliation: Department of Neurosurgery, Yokohama Sakae Kyosai Hospital, Sakae-ku, Yokohama 247-8581, Japan.
authors.forename: Tomoya
authors.initials: T
authors.lastname: Kamide
authors.affiliation: Department of Neurosurgery, Yokohama Sakae Kyosai Hospital, Sakae-ku, Yokohama 247-8581, Japan.
authors.forename: Kentaro
authors.initials: K
authors.lastname: Mori
authors.affiliation: Department of Neurosurgery, Yokohama Sakae Kyosai Hospital, Sakae-ku, Yokohama 247-8581, Japan.
authors.forename: Shunsuke
authors.initials: S
authors.lastname: Seki
authors.affiliation: Department of Neurosurgery, Yokohama Sakae Kyosai Hospital, Sakae-ku, Yokohama 247-8581, Japan.
authors.forename: Motohiro
authors.initials: M
authors.lastname: Nomura
keywords: Aneurysm; anomaly; duplicated; middle cerebral artery