Open AccessGamma knife radiosurgery for patients with brain metastases from non–small cell lung cancer: Comparison of survival between <5 and ≥5 metastases
Author(s) -
Zhao Xu,
Ding Shouluan,
Zhang Ming,
Wang Chengwei
Publication year - 2022
Publication title -
thoracic cancer
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.823
H-Index - 28
eISSN - 1759-7714
pISSN - 1759-7706
DOI - 10.1111/1759-7714.14532
Subject(s) - medicine , radiosurgery , lung cancer , oncology , brain metastasis , cancer , gamma knife , radiology , metastasis , radiation therapy
Background Current evidence‐based guidelines support stereotactic radiosurgery (SRS) for patients with up to four brain metastases (BMs). However, debate continues about how many tumors may be treated by SRS alone. Methods This retrospective study included non–small cell lung cancer (NSCLC) patients with BMs treated with gamma knife as the initial treatment for cerebral lesions. The patients were followed up to obtain their survival information. The outcomes were statistically analyzed to compare the differences in survival between the <5 BMs and ≥5 BMs groups and to identify prognostic factors. Results A total of 77 patients were divided into two groups (54 patients with <5 BMs and 23 patients with ≥5 BMs). The median overall survival (OS) was 18.3 months in the <5 BMs group and 17.7 months in the ≥5 BMs group. The median intracranial progression‐free survival (IPFS) was 9.0 months in the <5 BMs group and 9.9 months in the ≥5 BMs group. There was no significant difference in OS and IPFS between the two groups. The multivariate analysis demonstrated that adenocarcinoma, controlled primary cancer, higher Karnofsky Performance Scale (KPS), and salvage treatment were independent prognostic factors favoring longer OS. Conclusion SRS alone as the initial treatment for NSCLC patients with more than four BMs was non‐inferior to SRS for those with one to four BMs in terms of OS and IPFS.