title: Surgical treatment of paraventricular cavernous angioma: fibre tracking for visualizing the corticospinal tract and determining surgical approach.
abstract: Surgical treatment of deep-seated lesions involving the corticospinal tract is one of the most challenging areas of contemporary neurosurgery, even given the recent development of radiological methods including three-dimensional anisotropy contrast magnetic resonance imaging (MRI) axonography. Fibre tracking using diffusion tensor imaging is another MRI technique that can be used to visualize anisotropy and the orientation of white matter tracts in the brain. We report herein a patient with a paraventricular cavernous angioma manifesting as hemiparesis caused by haemorrhage. Preoperative conventional MRI failed to determine the anatomical relationship between the paraventricular lesion and the corticospinal tract, whereas fibre tracking using free software (dTV for MR-DTI analysis) indicated that the corticospinal tract was displaced anterolaterally from the medial side. The paraventricular lesion was completely removed without damaging the corticospinal tract using a transcortical transventricular approach. Preoperative fibre tracking is useful in surgical planning for procedures involving deep-seated lesions adjacent to the corticospinal tract, and may avoid postoperative morbidity due to corticospinal tract injury.
authors.affiliation: Department of Neurosurgery, Tohoku University Graduate School of Medicine, 1-1, Seiryo-machi, Aoba-ku, Sendai 980-8574, Japan.
authors.forename: Kuniyasu
authors.initials: K
authors.lastname: Niizuma
authors.forename: Miki
authors.initials: M
authors.lastname: Fujimura
authors.forename: Toshihiro
authors.initials: T
authors.lastname: Kumabe
authors.forename: Shuichi
authors.initials: S
authors.lastname: Higano
authors.forename: Teiji
authors.initials: T
authors.lastname: Tominaga
mesh_terms: D000328:Adult; D038524:Diffusion Magnetic Resonance Imaging; D005260:Female; D020786:Hemangioma, Cavernous, Central Nervous System / Q000000981:diagnostic imaging* / Q000473:pathology* / Q000601:surgery; D006429:Hemiplegia / Q000209:etiology / Q000503:physiopathology / Q000517:prevention & control; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods / Q000592:standards; D020772:Internal Capsule / Q000000981:diagnostic imaging* / Q000473:pathology* / Q000601:surgery; D020547:Lateral Ventricles / Q000000981:diagnostic imaging / Q000473:pathology; D009413:Nerve Fibers, Myelinated / Q000000981:diagnostic imaging; D019635:Neurosurgical Procedures / Q000379:methods / Q000592:standards; D011183:Postoperative Complications / Q000209:etiology / Q000503:physiopathology / Q000517:prevention & control; D011237:Predictive Value of Tests; D011300:Preoperative Care / Q000379:methods / Q000592:standards; D011712:Pyramidal Tracts / Q000000981:diagnostic imaging* / Q000473:pathology* / Q000601:surgery; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome