title: Transdural imaging of meningiomas by indocyanine green videography: the eclipse sign.
abstract: BACKGROUND
  Indocyanine green videography has been introduced into neurosurgical fields for minimally invasive neurosurgery. To establish a new intraoperative imaging modality, we performed transdural indocyanine green videography during the surgery of meningiomas.
  
  
  METHODS
  A dose of 12.5 mg of indocyanine green was injected transvenously in two cases of meningiomas just before the dural opening. Transdural indocyanine green videography was monitored.
  
  
  RESULTS
  The cortical arteries and veins and the venous sinus were identified by the indocyanine green videography transdurally in both cases. The projection of meningiomas was identified as the shadow and signal negative regions, and was visualized as "the Eclipse."
  
  
  CONCLUSIONS
  Transdural observation of the cortical arteries and veins and the venous sinus was successfully performed followed by the visualization of the projection of meningiomas as the shadow. We propose this sign as "the Eclipse sign." This transdural imaging method was of value in terms of precise and minimal dural incision.
authors.affiliation: Department of Neurosurgery, Faculty of Medicine, Fukuoka University, Fukuoka, Japan. tueba@fukuoka-u.ac.jp
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Ueba
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Abe
authors.forename: Toshio
authors.initials: T
authors.lastname: Higashi
authors.forename: Tooru
authors.initials: T
authors.lastname: Inoue
mesh_terms: D004388:Dura Mater / Q000473:pathology* / Q000601:surgery; D006801:Humans; D007208:Indocyanine Green; D008577:Meningeal Neoplasms / Q000473:pathology* / Q000601:surgery; D008579:Meningioma / Q000473:pathology* / Q000601:surgery; D016343:Monitoring, Intraoperative / Q000379:methods*; D019635:Neurosurgical Procedures / Q000379:methods; D014741:Video Recording
chemical_list: D007208:Indocyanine Green