Upfront stereotactic radiosurgery in patients with brain metastases from small cell lung cancer: retrospective analysis of 41 patients

被引:27
作者
Yomo, Shoji [1 ]
Hayashi, Motohiro [2 ]
机构
[1] Aizawa Hosp, Aizawa Comprehens Canc Ctr, Div Radiat Oncol, Matsumoto, Nagano, Japan
[2] San Ai Hosp, Saitama Gamma Knife Ctr, Saitama, Japan
来源
RADIATION ONCOLOGY | 2014年 / 9卷
关键词
Brain metastases; Small cell lung cancer; Stereotactic radiosurgery; Whole brain radiotherapy; PROPHYLACTIC CRANIAL IRRADIATION; PARTITIONING ANALYSIS RPA; RADIATION-THERAPY; PHASE-III; RADIOTHERAPY; TUMORS;
D O I
10.1186/1748-717X-9-152
中图分类号
R73 [肿瘤学];
学科分类号
100214 ;
摘要
Background: Although the efficacy of prophylactic or therapeutic whole brain radiotherapy (WBRT) for brain metastases (BM) from small cell lung cancer (SCLC) is well established, the role of stereotactic radiosurgery (SRS) has yet to be determined. In the present retrospective analysis, we investigated whether upfront SRS might be an effective treatment option for patients with BM from SCLC. Methods: We analyzed 41 consecutive patients with a limited number of BM (<= 10) from SCLC who received SRS as the initial treatment. No prophylactic and therapeutic WBRT was given prior to SRS. The median patient age was 69 years and the median Karnofsky performance status (KPS) score was 90. Repeat SRS was given for new distant lesions detected on follow-up neuroradiological imaging, as necessary. Overall survival, neurological death, and local and distant BM recurrence rates were analyzed. The survival results were tested with three prognostic scoring systems validated for SCLC: Diagnosis-specific graded prognostic assessment (DS-GPA), Radiation therapy oncology group -recursive partitioning analysis and Rades's survival score. Results: One-and 2-year overall survival rates were 44% and 17%, respectively. The median survival time was 8.1 months. Survival results replicated the DS-GPA (P = 0.022) and Rades's survival score (P = 0.034). On multivariate analysis, patients with high KPS (hazard ratio (HR): 0.308, P = 0.009) and post-SRS chemotherapy (HR: 0.324, P = 0.016) had better overall survival. In total, 95/121 tumors (79%) in 34 patients (83%) with sufficient radiological follow-up data were evaluated. Six-and 12-month rates of local control failure were 0% and 14%, respectively. Six-and 12-month distant BM rates were 22% and 44%, respectively. Repeat SRS, salvage WBRT and microsurgery were subsequently required in 18, 7 and one patient, respectively. Symptomatic radiation injury developed in two patients and both were treated conservatively. Conclusions: Our survival analyses with the validated prognostic grading systems suggested upfront SRS for limited BM from SCLC to be a potential treatment option, with patient survival being slightly more than eight months after SRS. Although SRS provided durable local tumor control, repeat treatment was needed in nearly half of patients to achieve control of distant BM.
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页数:9
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