although this is not the current protocol, these studies are interesting
hope this helps
Does aggressive local therapy improve survival in metastatic breast cancer?
Khan SA; Stewart AK; Morrow M
Department of Surgery, Northwestern University Medical School, and the American College of Surgeons, Chicago, Ill 60611, USA.
BACKGROUND: Women with metastatic breast cancer and an intact primary tumor are currently treated with systemic therapy. Local therapy of the primary tumor is considered irrelevant to the outcome, and is recommended only for palliation of symptoms. METHODS: We have examined the use of local therapy, and its impact on survival in patients presenting with stage IV breast cancer at initial diagnosis, who were reported to the National Cancer Data Base (NCDB) between 1990 and 1993. RESULTS: A total of 16,023 patients with stage IV disease were identified in the NCDB during this period, of whom 6861 (42.8%) received either no operation or a variety of diagnostic or palliative procedures, and 9162 (57.2%) underwent partial (3513) or total (5649) mastectomy. The presence of free surgical margins was associated with an improvement in 3-year survival in partial or total mastectomy groups (26% vs 35%, respectively). A multivariate proportional hazards model identified the number of metastatic sites, the type of metastatic burden, and the extent of resection of the primary tumor as significant independent prognostic covariates. Women treated with surgical resection with free margins, when compared with those not surgically treated, had superior prognosis, with a hazard ratio of 0.61 (95% confidence interval 0.58,0.65). CONCLUSIONS: These data suggest that the role of local therapy in women with stage IV breast cancer needs to be re-evaluated, and local therapy plus systemic therapy should be compared with systemic therapy alone in a randomized trial.
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Effect of primary tumor extirpation in breast cancer patients who present with stage IV disease and an intact primary tumor.
Babiera GV; Rao R; Feng L; Meric-Bernstam F; Kuerer HM; Singletary SE; Hunt KK; Ross MI; Gwyn KM; Feig BW; Ames FC; Hortobagyi GN
Department of Surgical Oncology, Unit 444, The University of Texas M. D. Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, Texas 77030, USA.
gvbabiera@mdanderson.org
BACKGROUND: Currently, therapy for breast cancer patients with stage IV disease and an intact primary tumor is metastasis directed; the primary tumor is treated only when it causes symptoms. A recent review suggested that surgery may improve long-term survival in such patients. We evaluated the effect of surgery in such patients on long-term survival and disease progression. METHODS: We reviewed the records of all breast cancer patients treated at our institution between 1997 and 2002 who presented with stage IV disease and an intact primary tumor. Information collected included demographics, tumor characteristics, site(s) of metastases, type/date of operation, use of radiotherapy, chemotherapy and hormonal therapy, disease progression (time to progression and location of progression) in the first year after diagnosis, and last follow-up. Overall and metastatic progression-free survival were compared between surgery and nonsurgery patients. RESULTS: Of 224 patients identified, 82 (37%) underwent surgical extirpation of the primary tumor (segmental mastectomy in 39 [48%] and mastectomy in 43 [52%]), and 142 (63%) were treated without surgery. The median follow-up time was 32.1 months. After adjustment for other covariates, surgery was associated with a trend toward improvement in overall survival (P=.12; relative risk, .50; 95% confidence interval, .21-1.19) and a significant improvement in metastatic progression-free survival (P=.0007; relative risk, .54; 95% confidence interval, .38-.77). CONCLUSIONS: Removal of the intact primary tumor for breast cancer patients with synchronous stage IV disease is associated with improvement in metastatic progression-free survival. Prospective studies are needed to validate these findings.
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