A Case of Cyst Formation 20 Years After Gamma Knife Radiosurgery for Cerebral Arteriovenous Malformation
- VernacularTitle:脳動静脈奇形のガンマナイフ治療後，20年を経て嚢胞を伴う腫瘤を生じた1例
- Author:
Hayato YOKOYAMA
1
;
Takeshi OKADA
2
;
Otone ENDO
1
;
Kentaro FUJII
1
;
Kai TAKAYANAGI
1
;
Taku HIRAMATSU
1
Author Information
- From:Journal of the Japanese Association of Rural Medicine 2020;69(1):79-85
- CountryJapan
- Language:Japanese
- Abstract: A 52-year-old woman who had two episodes of cerebral hemorrhage due to cerebral arteriovenous malformation (AVM) had been treated with gamma knife radiosurgery twice. Complete obliteration of the AVM was confirmed after treatment and she was making steady progress. Twenty years after gamma knife radiosurgery, computed tomography showed cyst formation. The cyst grew larger with ensuing neurological signs and symptoms, so we performed surgery. Thereafter, it was possible to make a pathological assessment. Delayed cyst formation after gamma knife radiosurgery for AVM is known to be one of the late adverse effects of radiation but little is known beyond 10 years postoperatively. We report here on a case of cyst formation 20 years after gamma knife radiosurgery for AVM.
