Clinical relevance and low tumor-initiating properties of oligometastatic breast cancer in pulmonary metastasectomy.

Abstract:

:Metastatic breast cancer is a systemic disease. However, certain subsets of patients, such as those with oligometastatic breast cancer (OMBC), have long-term survival prospects. Our aim was to evaluate the clinical relevance of OMBC in pulmonary metastasectomy of recurrent breast cancer. We also investigated lung metastases for the prevalence of CD44+/CD24-/low tumor cells and evaluated their prognostic significance. We reviewed data from a registry of breast cancer patients with lung metastases who underwent pulmonary metastasectomy at Jikei University Hospital. We analyzed prognostic factors for overall survival (OS) and progression-free survival (PFS) after metastasectomy and examined the prognostic difference between OMBC and non-OMBC patients. CD44+/CD24-/low tumor cells were detected by immunohistochemical analysis of lung metastases sites. Among 17 breast cancer patients with lung metastasis, 5-year OS and PFS rates were 72 and 36 %, respectively. Better OS was observed among patients with OMBC. Patients with OMBC, estrogen receptor-positive cells, and disease-free intervals of >8 years had better PFS. The presence of CD44+/CD24-/low tumor cells influenced progression after lung metastasectomy, with median PFS of only 6 months in patients with a high prevalence of cancer-initiating cells. CD44+/CD24-/low cells with cancer-initiating properties were present in only 9 % ± 3 of patients with OMBC, but were found in 73 % ± 12 of patients with non-OMBC. Pulmonary metastasectomy may be a treatment option for OMBC patients with lung metastases. Better prognosis of OMBC may be associated with low levels of cancer-initiating cells.

authors

Mimoto R,Kobayashi T,Imawari Y,Kamio M,Kato K,Nogi H,Toriumi Y,Hirooka S,Uchida K,Takeyama H

doi

10.1007/s10549-014-3111-7

subject

Has Abstract

pub_date

2014-09-01 00:00:00

pages

317-24

issue

2

eissn

0167-6806

issn

1573-7217

journal_volume

147

pub_type

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