title: Dual-port technique in navigation-guided endoscopic resection for intraparenchymal brain tumor.
abstract: BACKGROUND
  In navigation-guided endoscopic surgery performed via a single port, the interference of surgical instruments often disturbs the resection and hemostasis.
  
  
  METHODS
  With regard to this, we designed a dual-port technique for navigation-guided endoscopic surgery in a 62-year-old man, with intraparenchymal anaplastic astrocytoma. Two transparent sheaths with Nelaton tubes were inserted in the front of the target lesion via an infinity-shaped burr hole, under the control of the navigation system. The lesion was removed partially using a rigid endoscope and several surgical tools through the bilateral ports. Using the new method, it was convenient to perform hemostasis with bipolar coagulation and aspiration, without any interference from the surgical instruments during the surgery.
  
  
  CONCLUSIONS
  The offered dual-port technique may be included in surgery planning for elderly patients or patients in particular conditions, with intraparenchymal brain tumors.
authors.affiliation: Department of Neurosurgery, Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8575, Japan.
authors.forename: Yosuke
authors.initials: Y
authors.lastname: Masuda
authors.forename: Eiichi
authors.initials: E
authors.lastname: Ishikawa
authors.forename: Toshihide
authors.initials: T
authors.lastname: Takahashi
authors.forename: Satoshi
authors.initials: S
authors.lastname: Ihara
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Yamamoto
authors.forename: Alexander
authors.initials: A
authors.lastname: Zaboronok
authors.forename: Akira
authors.initials: A
authors.lastname: Matsumura