title: Transient memory disturbance after removal of an intraventricular trigonal meningioma by a parieto-occipital interhemispheric precuneus approach: Case report.
abstract: BACKGROUND
  Pitfalls in a parieto-occipital interhemispheric precuneus approach for the ventricular trigonal region of a dominant hemisphere have been rarely reported. We described a case with memory disturbance after surgery using this approach.
  
  
  METHODS
  A 57-year-old, right-handed woman complained of numbness of the lower extremities and underwent magnetic resonance imaging, which incidentally demonstrated a trigonal meningioma in the left lateral ventricle with a maximal diameter of 4 cm. The patient's preoperative neurologic examination was normal. The tumor was successfully removed by a parieto-occipital interhemispheric approach with an incision of the left precuneus cortex. Postoperative motor, sensory, and visual functions were normal; however, recent memory disturbance developed, which gradually resolved in the following 3 months.
  
  
  CONCLUSIONS
  An interhemispheric precuneus approach is a useful alternative to trigonal tumors with few surgical complications, but postoperative memory disturbance can be one pitfall of this procedure.
authors.affiliation: Department of Neurological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-8558, Japan. kojitoku@md.okayama-u.ac.jp
authors.forename: Koji
authors.initials: K
authors.lastname: Tokunaga
authors.forename: Takashi
authors.initials: T
authors.lastname: Tamiya
authors.forename: Isao
authors.initials: I
authors.lastname: Date
mesh_terms: D005260:Female; D006801:Humans; D008569:Memory Disorders / Q000209:etiology*; D008577:Meningeal Neoplasms / Q000601:surgery*; D008579:Meningioma / Q000601:surgery*; D008875:Middle Aged; D019635:Neurosurgical Procedures / Q000009:adverse effects* / Q000379:methods; D009778:Occipital Lobe / Q000601:surgery; D010296:Parietal Lobe / Q000601:surgery; D011183:Postoperative Complications