Gamma Knife Radiosurgery for Corpus-Callosal Arteriovenous Malformation

Choo, Yeon Soo; Lee, Seok-Jae; Kim, Moo Seong; Joo, Sang Wook; No, Seong Jin; Paeng, Seong Hwa; Pyo, Se Yeong; Jeong, Yeong Gyun; Lee, Sun Il; Jung, Yong Tae; Jeong, Hae Woong

Original article

Journal of the Korean Society of Stereotactic and Functional Neurosurgery 2009;5(1):47-51.
Published online June 30, 2009.

Gamma Knife Radiosurgery for Corpus-Callosal Arteriovenous Malformation

Yeon Soo Choo, Seok-Jae Lee, Moo Seong Kim, Sang Wook Joo, Seong Jin No, Seong Hwa Paeng, Se Yeong Pyo, Yeong Gyun Jeong, Sun Il Lee, Yong Tae Jung, Hae Woong Jeong

Department of Neurosurgery, Diagnostic Radiology, College of Medicine, Inje University, Busan Paik Hospital, Busan, Korea

Abstract

Objective
In copus-callosal area arteriovenous malformation (AVM), surgical removal produce high risk of disabling infarction and hemiplegia. The policy has been that AVM should be treated with minimal morbidity. Our study was aimed to determine the efficacy of Gamma knife radiosurgery for callosal area AVM. Materials and Methods: 400 patients with AVM who underwent Gamma knife (GK) radiosurgery between October, 1994 and October, 2005, 33 patients had corpus-callosal AVM and 31 cases were able to follow-up. The mean age was 31.3 years (range 11-53 year). The male-to-female ratio was 1.9：1. The mean volume was 15.1cm3 . The mean maximal dose was 37.4 gray (Gy) and the mean marginal dose was 18.3Gy. The mean follow-up period was 32.1 months.
Results
Complete obliteration was achieved in 20 cases and partial obliteration in 11 cases. Delayed cyst formation developed in the two patients after GK radiosurgery, they received cyst removal operation, etc. There was no bleeding during latent period.
Conclusion
GK radiosurgery is effective treatment for corpus-callosal AVM. In spite of the delayed cyst formation sometimes develop after complete obliteration of AVM.

Key Words: Arteriovenous malformation, Gamma-knife radiosurgery, Complete obliteration.