Breast radiotherapy as part of loco-regional treatments in stage IV breast cancer patients with oligometastatic disease☆
Received 18 August 2009; received in revised form 12 February 2010; accepted 23 February 2010. published online 29 March 2010.
Abstract
Background
Local treatments seem to improve metastasis progression-free survival (MPFS) and overall survival (OS) when added to systemic therapies in stage IV breast cancer.
Methods
From 1990 to 2003, we reviewed 9138 cases treated and registered in the Institut Gustave-Roussy breast cancer database. Among them, 308 had presented with stage IV disease. Eighty percent of patients (n=239) had received a loco-regional treatment and they were categorized into two groups: loco-regional radiotherapy (LRRT) alone (Group 1; n=147) or breast and axillary surgery±LRRT (Group 2; n=92).
Results
The median follow-up was 6.5years. LRRT obtained a long-standing loco-regional clinical response in 85% of patients. The 3-year MPFS rates were 20% in Group 1 and 39% in Group 2; the 3-year OS rates were 39% and 57%, respectively. However, no significant differences in MPFS or OS were observed between the two groups when adjusted on prognostic factors.
Conclusions
Radiation therapy alone provides long-standing local control and yields MPFS and OS rates equivalent to those obtained when radiation therapy is combined with surgery, whatever the prognostic factors. Loco-regional therapies, especially radiation therapy alone, may have an important role to play in the treatment of selected patients with stage IV breast cancer.
ABSTRACT