title: Neuroendoscopic Trans-Third Ventricular Approach for Surgical Management of Ecchordosis Physaliphora.
abstract: BACKGROUND
  We sought to report the successful surgical management of a case of ecchordosis physaliphora (EP) using a neuro-endoscopic trans-third ventricular approach (ETTVA) and to provide a current review of literature on EP.
  
  
  METHODS
  A 57-year-old man presenting with a 2-year history of diplopia due to right abducens nerve palsy and paresthesia of the left body underwent magnetic resonance imaging, which revealed a retroclival intracisternal lesion. The cystic lesion was considered to be most likely EP according to neuroradiologic features. The patient underwent an endoscopic trans-third ventricular resection. A pediatric endoscope was passed from a precoronal burr hole through the left lateral into the third ventricle. The floor of the third ventricle was opened by a 2-micron laser. This approach permitted us to expose the lesion in the retroclival cistern and follow up with a subtotal removal. Remnants of the capsule, which were firmly adherent to small pontine arteries and the left abducens nerve, were left. Histology confirmed EP. The patient recovered well from surgery, and symptoms regressed at clinical follow-up.
  
  
  CONCLUSIONS
  The endoscopic approach for third ventriculostomy can also be used for the surgical management of retroclival lesions. However, a small pediatric endoscope with an angled view, which can be passed through the floor of the third ventricle without causing harm, is mandatory to explore all important structures in the narrow surgical space. Limitations in this delicate environment are firm adhesions to vessels and nerves because only 1-instrument manipulation is possible and bleeding must be avoided.
authors.affiliation: Department of Neurosurgery, University of Tuebingen, Tuebingen, Germany. Electronic address: sasan_adib2002@yahoo.de.
authors.forename: Sasan Darius
authors.initials: SD
authors.lastname: Adib
authors.affiliation: Department of Neuroradiology, University of Tuebingen, Tuebingen, Germany; Lysholm Department of Neuroradiology, National Hospital of Neurology and Neurosurgery, University College London Hospitals, United Kingdom.
authors.forename: Sotirios
authors.initials: S
authors.lastname: Bisdas
authors.affiliation: Department of Neuropathology, University of Tuebingen, Tuebingen, Germany.
authors.forename: Antje
authors.initials: A
authors.lastname: Bornemann
authors.affiliation: Department of Neurosurgery, University of Tuebingen, Tuebingen, Germany.
authors.forename: Martin U
authors.initials: MU
authors.lastname: Schuhmann
mesh_terms: D006801:Humans; D008297:Male; D008875:Middle Aged; D044583:Neuroendoscopy / Q000379:methods*; D009672:Notochord / Q000002:abnormalities* / Q000473:pathology / Q000601:surgery*; D011149:Pons / Q000473:pathology* / Q000601:surgery*; D020542:Third Ventricle / Q000473:pathology / Q000601:surgery*; D016896:Treatment Outcome; D014696:Ventriculostomy / Q000379:methods
keywords: Ecchordosis physaliphora; Trans-third ventricular approach