Abstract:
:Stereotactic radiosurgery for large brain metastases (BM) not amenable to surgical resection is associated with limited local control and neurotoxicity, while hypofractionated stereotactic radiotherapy (HFSRT) has emerged as a promising option. We retrospectively evaluated 61 patients with BM larger than 2 cm in the maximum diameter, who were treated with HFSRT (mainly 35 Gy/5 fractions) in our center between 2006-2016, focusing on the effect of BM size on outcomes. Eligible patients were divided according to the maximum BM diameter (group A [23 patients]: ≥3 cm, group B [22 patients]: <3 cm) to assess the relationship between tumor size and prognosis or safety. The primary outcome was the local control rate (LCR), and secondary outcomes were the response rate (RR), brain progression-free survival (BPFS), median survival time (MST), and radionecrosis (RN). Univariate and multivariate analyses for LCR were conducted using Cox's proportional hazards model. In the 45 eligible patients (58 lesions) enrolled in this study, the RR was 86.4% with an overall LCR of 64.7% at 12 months (67.1% for group A and 61.5% for group B [p = 0.45]). The median BPFS and MST were 11.6 and 14.2 months, respectively. Univariate analyses revealed that female patients and gynecological cancer patients had poorer LCR, but they were not significantly independent prognostic factors (p = 0.06, 0.09, respectively). Two patients (4.4%) experienced RN that was detected more than 4 years after HFSRT. We conclude that HFSRT is safe for large BM but further studies are needed to determine optimal doses and fractions.
journal_name
Nagoya J Med Scijournal_title
Nagoya journal of medical scienceauthors
Koide Y,Tomita N,Adachi S,Tanaka H,Tachibana H,Kodaira Tdoi
10.18999/nagjms.81.3.397subject
Has Abstractpub_date
2019-08-01 00:00:00pages
397-406issue
3eissn
0027-7622issn
2186-3326journal_volume
81pub_type
杂志文章abstract::Accessibility to health care services in Thailand is generally good, but a few areas in the country are difficult to reach. The purpose of this study was to investigate the accessibility of health care services in rural and remote areas of Thailand. It was conducted in 16 remote villages within a catchment area with a...
journal_title:Nagoya journal of medical science
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journal_title:Nagoya journal of medical science
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journal_title:Nagoya journal of medical science
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journal_title:Nagoya journal of medical science
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journal_title:Nagoya journal of medical science
pub_type: 杂志文章,多中心研究
doi:
更新日期:2013-02-01 00:00:00
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journal_title:Nagoya journal of medical science
pub_type: 杂志文章
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journal_title:Nagoya journal of medical science
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doi:
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journal_title:Nagoya journal of medical science
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更新日期:2014-02-01 00:00:00
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doi:10.18999/nagjms.80.4.559
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journal_title:Nagoya journal of medical science
pub_type: 杂志文章
doi:
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journal_title:Nagoya journal of medical science
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journal_title:Nagoya journal of medical science
pub_type: 杂志文章,评审
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journal_title:Nagoya journal of medical science
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