PMID- 22984665 OWN - NLM STAT- PubMed-not-MEDLINE DCOM- 20120918 LR - 20211021 IS - 2234-3164 (Electronic) IS - 2234-1900 (Print) IS - 2234-1900 (Linking) VI - 29 IP - 3 DP - 2011 Sep TI - Radiation-induced brain injury: retrospective analysis of twelve pathologically proven cases. PG - 147-55 LID - 10.3857/roj.2011.29.3.147 [doi] AB - PURPOSE: This study was designed to determine the influencing factors and clinical course of pathologically proven cases of radiation-induced brain injury (RIBI). MATERIALS AND METHODS: The pathologic records of twelve patients were reviewed; these patients underwent surgery following radiotherapy due to disease progression found by follow-up imaging. However, they were finally diagnosed with RIBI. All patients had been treated with 3-dimensional conventional fractionated radiotherapy and/or radiosurgery for primary or metastatic brain tumors with or without chemotherapy. The histological distribution was as follows: two falx meningioma, six glioblastoma multiform (GBM), two anaplastic oligodendroglioma, one low grade oligodendroglioma, and one small cell lung cancer with brain metastasis. RESULTS: Radiation necrosis was noted in eight patients and the remaining four were diagnosed with radiation change. Gender (p = 0.061) and biologically equivalent dose (BED)(3) (p = 0.084) were the only marginally influencing factors of radiation necrosis. Median time to RIBI was 7.3 months (range, 0.5 to 61 months). Three prolonged survivors with GBM were observed. In the subgroup analysis of high grade gliomas, RIBI that developed <6 months after radiotherapy was associated with inferior overall survival rates compared to cases of RIBI that occurred >/=6 months (p = 0.085). CONCLUSION: Our study demonstrated that RIBI could occur in early periods after conventional fractionated brain radiotherapy within normal tolerable dose ranges. Studies with a larger number of patients are required to identify the strong influencing factors for RIBI development. FAU - Lee, Dong-Soo AU - Lee DS AD - Department of Radiation Oncology, The Cancer Center of Seoul St. Mary's Hospital, The Catholic University of Korea, Seoul, Korea. FAU - Yu, Mina AU - Yu M FAU - Jang, Hong-Seok AU - Jang HS FAU - Kim, Yeon-Sil AU - Kim YS FAU - Choi, Byung-Ock AU - Choi BO FAU - Kang, Young-Nam AU - Kang YN FAU - Lee, Youn-Soo AU - Lee YS FAU - Kim, Dong-Chul AU - Kim DC FAU - Hong, Yong-Kil AU - Hong YK FAU - Jeun, Sin-Soo AU - Jeun SS FAU - Yoon, Sei-Chul AU - Yoon SC LA - eng PT - Journal Article DEP - 20110930 PL - Korea (South) TA - Radiat Oncol J JT - Radiation oncology journal JID - 101577577 PMC - PMC3429897 OTO - NOTNLM OT - Brain tumor OT - Chemoradiation OT - Radiation injury OT - Radiation necrosis COIS- No potential conflict of interest relevant to this article was reported. EDAT- 2012/09/18 06:00 MHDA- 2012/09/18 06:01 PMCR- 2011/09/01 CRDT- 2012/09/18 06:00 PHST- 2011/03/24 00:00 [received] PHST- 2011/06/08 00:00 [revised] PHST- 2011/06/15 00:00 [accepted] PHST- 2012/09/18 06:00 [entrez] PHST- 2012/09/18 06:00 [pubmed] PHST- 2012/09/18 06:01 [medline] PHST- 2011/09/01 00:00 [pmc-release] AID - 10.3857/roj.2011.29.3.147 [doi] PST - ppublish SO - Radiat Oncol J. 2011 Sep;29(3):147-55. doi: 10.3857/roj.2011.29.3.147. Epub 2011 Sep 30.