TY - JOUR
T1 - Evaluation of 2 whole-brain radiotherapy schedules and prognostic factors for brain metastases in breast cancer patients
AU - Rades, Dirk
AU - Lohynska, Radka
AU - Veninga, Theo
AU - Stalpers, Lukas J.A.
AU - Schild, Steven E.
N1 - Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2007/12/1
Y1 - 2007/12/1
N2 - BACKGROUND. The majority of breast cancer patients with brain metastases receive whole-brain radiotherapy (WBRT) and have a survival of only a few months. A short WBRT regimen would be preferable if it provides survival that is similar to that achieved with longer programs. This retrospective study compared survival and local control within the brain resulting from short-course WBRT with longer programs in 207 breast cancer patients. METHODS. Sixty-nine patients treated with 5 fractions of 4 grays (Gy) each given within 5 days were compared with 138 patients treated with 10 fractions of 3 Gy each given over 2 weeks or 20 fractions of 2 Gy each given over 4 weeks. Six additional potential prognostic factors were investigated: age, Karnofsky performance score (KPS), number of brain metastases, the presence of extracranial metastases, interval from tumor diagnosis to WBRT, and recursive partitioning analysis (RPA) class. RESULTS. On univariate analysis, the WBRT regimen was not found to be associated with survival (P = .254) or local control (P = .397). Improved survival was associated with a KPS >70 (P < .001), single brain metastasis (P = .023), the absence of extracranial metastases (P < .001), and lower RPA class (P < .001). On multivariate analysis, which was performed without RPA class because this is a confounding variable, KPS (relative risk [RR] of 4.00; P < .001) and the presence of extracranial metastases (RR of 1.54; P =.024) maintained statistical significance. On univariate analysis, local control was associated with KPS (P < .001) and RPA class (P < .001). On multivariate analysis, local control was found to be associated with a KPS >70 (RR of 5.75; P < .001). CONCLUSIONS. Short-course WBRT with 5 fractions of 4 Gy each resulted in survival and local control that were similar to longer programs in breast cancer patients with brain metastases. The dose of 5 fractions of 4 Gy each appears preferable for the majority of these patients because it is less time consuming and more convenient.
AB - BACKGROUND. The majority of breast cancer patients with brain metastases receive whole-brain radiotherapy (WBRT) and have a survival of only a few months. A short WBRT regimen would be preferable if it provides survival that is similar to that achieved with longer programs. This retrospective study compared survival and local control within the brain resulting from short-course WBRT with longer programs in 207 breast cancer patients. METHODS. Sixty-nine patients treated with 5 fractions of 4 grays (Gy) each given within 5 days were compared with 138 patients treated with 10 fractions of 3 Gy each given over 2 weeks or 20 fractions of 2 Gy each given over 4 weeks. Six additional potential prognostic factors were investigated: age, Karnofsky performance score (KPS), number of brain metastases, the presence of extracranial metastases, interval from tumor diagnosis to WBRT, and recursive partitioning analysis (RPA) class. RESULTS. On univariate analysis, the WBRT regimen was not found to be associated with survival (P = .254) or local control (P = .397). Improved survival was associated with a KPS >70 (P < .001), single brain metastasis (P = .023), the absence of extracranial metastases (P < .001), and lower RPA class (P < .001). On multivariate analysis, which was performed without RPA class because this is a confounding variable, KPS (relative risk [RR] of 4.00; P < .001) and the presence of extracranial metastases (RR of 1.54; P =.024) maintained statistical significance. On univariate analysis, local control was associated with KPS (P < .001) and RPA class (P < .001). On multivariate analysis, local control was found to be associated with a KPS >70 (RR of 5.75; P < .001). CONCLUSIONS. Short-course WBRT with 5 fractions of 4 Gy each resulted in survival and local control that were similar to longer programs in breast cancer patients with brain metastases. The dose of 5 fractions of 4 Gy each appears preferable for the majority of these patients because it is less time consuming and more convenient.
UR - http://www.scopus.com/inward/record.url?scp=36448971899&partnerID=8YFLogxK
U2 - 10.1002/cncr.23082
DO - 10.1002/cncr.23082
M3 - Journal articles
C2 - 17893909
AN - SCOPUS:36448971899
SN - 0008-543X
VL - 110
SP - 2587
EP - 2592
JO - Cancer
JF - Cancer
IS - 11
ER -