Complications Of Gamma Knife Radiosurgery For AvmIzawa Masahiro1, Motohiro Hayashi2, Koutaro Nakaya1, Noriko Tamura2, Mikhail Chernov1, Yoshikazu Okada11TWMU Hospital, Tokyo, Japan 2Tokyo, Japan Keywords: arteriovenous malformation, complications, gamma knife, hemorrhage, cystInteractive Manuscript
Ask Questions of this Manuscript:
What is the background behind your study?
What is the purpose of your study?
Clinical analysis of complications after gamma knife radiosurgery for AVM was investigated.
Describe your patient group.
523 AVM patients who underwent GKR between 1992 and 2007 in Tokyo Women`s Medical University Hospital were evaluated. Twelve patients developed cyst formation after GKR of AVM. Ten patients bled after GKR.
Describe what you did.
Treatment protocol was as followed. The peripheral dose was delivered 12-26 Gy at the margin by using multi-isocenter technique. Patients were followed up by CT, MRI and DSA.
Describe your main findings.
Twelve cases of cyst formation were clinically analyzed.
Describe the main limitation of this study.
This is a retrospective study.
Describe your main conclusion.
Symptomatic cyst formation after GKR for AVM may require surgical treatment. There is possibility of residual AVM nidus despite of confirmation angiographical obliteration.
Describe the importance of your findings and how they can be used by others.
The dose planning is the most important factor depends on ergy. Long term follow up is recommended after nidus obliteration confirmed by angiography. Staged GKR was useful for selective cases.
Clinical analysis of complications after gamma knife radiosurgery for AVM was investigated.
523 AVM patients who underwent GKR between 1992 and 2007 in Tokyo Women`s Medical University Hospital were evaluated. Twelve patients developed cyst formation after GKR of AVM. Ten patients bled after GKR.
Treatment protocol was as followed. The peripheral dose was delivered 12-26 Gy at the margin by using multi-isocenter technique. Patients were followed up by CT, MRI and DSA.
Twelve cases of cyst formation were clinically analyzed.
This is a retrospective study.
Symptomatic cyst formation after GKR for AVM may require surgical treatment. There is possibility of residual AVM nidus despite of confirmation angiographical obliteration.
The dose planning is the most important factor depends on ergy. Long term follow up is recommended after nidus obliteration confirmed by angiography. Staged GKR was useful for selective cases.
Project Roles:
I. Masahiro (), M. Hayashi (), K. Nakaya (), N. Tamura (), M. Chernov (), Y. Okada ()
