Factors responsible for long-term survival in metastatic breast cancer

World Journal of Surgical Oncology

Hiroyasu Yokomise⁶  Hitoshi Houchi⁴  Koji Teramoto²  Manabu Date³  Naomi Fujiwara-Honjo⁷  Masahiro Ohtani¹  Hiroaki Tanaka⁴  Shoko Norimura⁵  Chisa Murazawa⁶  Shin-ichiro Hashimoto⁶  Keiichi Kontani⁶ 

[1] Kagawa Health Service Association, Health Care Center, 148 Fuseishi, Takamatsu 761-8071, Japan;Department of Surgery, Shiga University of Medical Science, 1-1 Seta, Otsu 520-2191Shiga, Japan;Department of Surgery, Date Hospital, 588-8 Kanko-cho, Takamatsu 760-0076Kagawa, Japan;Department of Pharmacy, Kagawa University Hospital, 1750-1 Miki-cho, Kita-gun 761-0793, Japan;Department of Surgery, Japanese Red Cross Hospital, 4-1-3 Ban-cho, Takamatsu 760-0017, Japan;Department of Thoracic, Breast and Endocrine Surgery, Kagawa University Faculty of Medicine, 1750-1 Miki-cho, Kita-gun 761-0793, Japan;Department of Radiology, Osaka Neurosurgery Hospital, 378-1 Sanmyo-cho, Takamatsu 761-8083, Japan

关键词: Metronomic chemotherapy;    Long-term survival;    Prognostic factor;    Metastatic breast cancer;   

Others  :  1147396
DOI  :  10.1186/1477-7819-12-344

 received in 2014-01-30, accepted in 2014-10-20,  发布年份 2014

【 摘 要 】

Background

Although survival of patients with metastatic breast cancer (MBC) has been significantly prolonged over the past decade due to improvement of anti-cancer therapeutics, only a few patients survive for more than 10 years. It has not been determined which patients can have long-term survival with treatment.

Methods

To determine prognostic factors responsible for long-term survival, we retrospectively compared clinicopathologic factors of patients with MBC who survived for 50 months or more after diagnosis with patients who did not. Of 70 patients with MBC who received chemotherapy between November 2005 and September 2011, 23 patients who survived for 50 months or more after diagnosis and 28 patients who died within 50 months after diagnosis were assessed for their clinicopathologic factors and outcomes.

Results

The proportion of patients with hormone receptor-positive (HR+) tumors was significantly higher and the proportion of patients with triple negative tumors (TN) was lower in long-term survivors than in non-long-term survivors (HR+: 87% versus 28.6%, P = 0.000037; TN: 13.1% versus 53.6%, P = 0.0028). Metastatic site, number of disease sites, prior chemotherapeutic regimens and human epidermal growth factor receptor-2 (HER2) status did not differ between the two groups. The proportion of patients who received metronomic regimens was significantly higher in long-term survivors than in non-long-term survivors (65.2% versus 35.7%, P = 0.034) when the most effective regimen among regimens that were received in metastatic settings was compared between the two groups. Overall response rate was significantly higher (82.6% versus 17.9%, P <0.00001) and time to treatment failure after receiving the most effective regimen was longer in long-term survivors than in non-long-term survivors (26 versus 5 months, P = 0.0001). The number of chemotherapeutic regimens for breast cancer and that for MBC did not differ between the two groups.

Conclusions

Patients with luminal-type MBC who benefit at least once from chemotherapy including metronomic regimens, or patients who continued to receive the most effective regimen for more than two years can be expected to have long-term survival after diagnosis of MBC, regardless of the number of chemotherapeutic regimens they had received.

【 授权许可】

   
2014 Kontani et al.; licensee BioMed Central Ltd.

【 图 表 】

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