A prospective pilot study of curative-intent stereotactic body radiation therapy in patients with 5 or fewer oligometastatic lesions

被引:204
作者
Milano, Michael T. [1 ]
Katz, Alan W. [1 ]
Muhs, Ann G. [1 ]
Philip, Abraham [1 ]
Buchholz, Daniel J. [2 ]
Schell, Michael C. [1 ]
Okunieff, Paul [1 ]
机构
[1] Univ Rochester, Med Ctr, Dept Radiat Oncol, Rochester, NY 14642 USA
[2] MD Anderson Canc Ctr, Dept Radiat Oncol, Orlando, FL USA
关键词
disease burden; local control; oligometastases; stereotactic body radiation;
D O I
10.1002/cncr.23209
中图分类号
R73 [肿瘤学];
学科分类号
100214 ;
摘要
BACKGROUND. It is hypothesized that oligometastatic disease represents a state of potentially curable, limited metastases. Stereotactic body radiation therapy (SBRT) is an option for patients who are not amenable to or do not want resection. METHODS. From 2001 to 2006, 121 patients with <= 5 detectable metastases were enrolled in 2 prospective studies that used curative-intent SBRT Most patients were treated with 10 fractions of 5 Gray. Stereotactic radiosurgery was offered to patients with brain metastases. RESULTS. The 2-year overall survival (OS), progression-free survival (PFS), local control (LC), and distant control (DC) rates were 50%, 26%, 67%, and 34%, respectively; and the respective 4-year rates values were 28%, 20%, 60%, and 25%. A greater net tumor volume predicted significantly worse OS, PFS, LC, and DC. Patients with breast cancer fared significantly better with respect to OS, PFS, LC, and DC) and patients with adrenal metastases had significantly worse OS, PFS, and DC despite the small number of such patients enrolled. Neither the number of metastatic lesions nor the number of organs involved was a significant predictor of outcome. Among 45 patients who remained alive at the last follow-up, 29 patients had no evidence of disease, including 23 patients with >= 2 years of follow-up. CONCLUSIONS. Oligometastatic disease is a potentially curable state of distant cancer spread. In this hypothesis-generating analysis, patients with less volume burden of their metastatic disease and those with primary breast cancer fared better. SBRT delivered with curative intent in patients with limited metastases should be investigated further. The Southwest Oncology Group is developing a prospective protocol to treat women who have limited breast cancer metastases with SBRT.
引用
收藏
页码:650 / 658
页数:9
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