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Open Access 01-12-2014 | Research

Factors responsible for long-term survival in metastatic breast cancer

Authors: Keiichi Kontani, Shin-ichiro Hashimoto, Chisa Murazawa, Shoko Norimura, Hiroaki Tanaka, Masahiro Ohtani, Naomi Fujiwara-Honjo, Manabu Date, Koji Teramoto, Hitoshi Houchi, Hiroyasu Yokomise

Published in: World Journal of Surgical Oncology | Issue 1/2014

Abstract

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.

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Title: Factors responsible for long-term survival in metastatic breast cancer
Authors: Keiichi Kontani
Shin-ichiro Hashimoto
Chisa Murazawa
Shoko Norimura
Hiroaki Tanaka
Masahiro Ohtani
Naomi Fujiwara-Honjo
Manabu Date
Koji Teramoto
Hitoshi Houchi
Hiroyasu Yokomise
Publication date: 01-12-2014
Publisher: BioMed Central
Published in: World Journal of Surgical Oncology / Issue 1/2014
Electronic ISSN: 1477-7819
DOI: https://doi.org/10.1186/1477-7819-12-344

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Factors responsible for long-term survival in metastatic breast cancer

Abstract

Background

Methods

Results

Conclusions

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Background

Methods

Results

Conclusions

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