|Title: ||Focal fractionated radiotherapy for intramedullary spinal arteriovenous malformations: 10-year experience.|
|Authors: ||Hida, Kazutoshi Browse this author|
|Shirato, Hiroki Browse this author|
|Isu, Toyohiko Browse this author|
|Seki, Toshitaka Browse this author|
|Onimaru, Rikiya Browse this author →KAKEN DB|
|Aoyama, Hidefumi Browse this author|
|Ushikoshi, Satoshi Browse this author|
|Miyasaka, Kazuo Browse this author|
|Iwasaki, Yoshinobu Browse this author|
|Keywords: ||arteriovenous malformation|
|Issue Date: ||Jul-2003|
|Publisher: ||American Association of Neurological Surgeons|
|Journal Title: ||Journal of Neurosurgery|
|Start Page: ||34|
|End Page: ||38|
|Abstract: ||Object. Radiosurgical treatment of spinal arteriovenous malformations (AVMs) is becoming a practical therapeutic
option as methodology improves, but no comparative study has yet been published on focal fractionated radiotherapy. The
authors report their experience with conventional and hypofractionated radiotherapy for spinal AVM.
Methods. Candidates for this study were patients who experienced symptoms due to an intramedullary AVM but were
ineligible for embolization or surgery. Of 21 patients with spinal AVMs, 10 cases in a 10-year period met this criterion.
Angiography and contrast-enhanced computerized tomography scanning were used for treatment planning in all cases.
Fractionated radiotherapy was performed using a linear accelerator, extracranial immobilization system, and frequent
orthogonal linacographic verification. The starting radiation dose was 32 Gy in two, 36 Gy in three, and 40 Gy in two
patients, in a regimen involving 1.8 to 2–Gy daily fractions; this was recently changed to a hypofractionation schedule of
30 Gy (in eight sessions) in one and 20 Gy (in four sessions) in two patients.
Results. The follow-up period ranged from 26 to 124 months (median of 49 months). There were no hemorrhages nor
any adverse reactions attributable to irradiation. Of the seven patients who consented to undergo follow-up angiography,
the nidus size decreased in five, but complete obliteration did not occur in any patient.
Conclusions. Because no patient experienced adverse effects, the maximum tolerable radiation dose for the spinal cord
associated with an AVM could not be identified, although it presumably is higher than those administered. The lack of
rebleeding in patients in whom complete angiographic occlusion was absent suggests that the natural history of spinal
AVMs may be less aggressive than previously reported.|
|Rights: ||The final version of the paper was published in J Neurosurg (Spine 1) 99:34–38, 2003. For reuse of any of the materials, including editorial copy, figures, or tables please contact the Journal of Neurosurgery at firstname.lastname@example.org|
|Type: ||article (author version)|
|Appears in Collections:||医学院・医学研究院 (Graduate School of Medicine / Faculty of Medicine) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)|