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Annals of Surgical Oncology
Published in: Annals of Surgical Oncology 9/2012

01-09-2012 | Breast Oncology

Outcome of Pure Mucinous Breast Carcinoma Compared to Infiltrating Ductal Carcinoma: A Population-based Study from China

Authors: A-Yong Cao, MD, Min He, MD, Zhe-Bin Liu, MD, Gen-Hong Di, MD, Jiong Wu, MD, Jin-Song Lu, MD, Guang-Yu Liu, MD, Zhen-Zhou Shen, MD, Zhi-Ming Shao, MD

Published in: Annals of Surgical Oncology | Issue 9/2012

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Abstract

Purpose

Pure mucinous breast carcinoma (PMBC) is a rare pathologic finding. Few studies have addressed the biologic features of PMBC and prognostic factors among patients with this disease. We performed a study to compare PMBC and invasive ductal carcinoma (IDC) by means of a large database to reliably assess the biologic phenotype and clinical behavior of PMBC.

Methods

A total of 2,511 patients who met the inclusion criteria were identified from 1999 to 2010; 2,202 patients had pure IDC and 309 had PMBC. Clinical and biologic features, overall survival, and recurrence/metastasis-free survival (RFS) were compared for both groups.

Results

PMBC had favorable characteristics including smaller size, lower rates of lymph node positivity, lower stage, higher expression of hormone receptors, and less HER2 overexpression. Patients with PMBC had better 10-year RFS (71 %) than patients with IDC (64 %). Multivariate analysis revealed that node status and tumor, node, metastasis system (TNM) stage were statistically significant prognostic factors for survival. RFS curves stratified for node status revealed a highly significant difference between node negative and node positive patients. Additionally, patients with PMBC underwent breast-conserving surgery (BCS) more frequently than patients with IDC, and the 5-year overall survival rate of the BCS group was not significantly different from the total mastectomy group.

Conclusions

PMBC in Chinese women showed less aggressive behavior and had a better prognosis than IDC, and this favorable outcome was maintained after 10 years. Node status and TNM stage appeared to be the most significant predictors of worse prognosis. BCS should be preferred over mastectomy in the treatment of early-stage PMBC.
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Metadata
Title
Outcome of Pure Mucinous Breast Carcinoma Compared to Infiltrating Ductal Carcinoma: A Population-based Study from China
Authors
A-Yong Cao, MD
Min He, MD
Zhe-Bin Liu, MD
Gen-Hong Di, MD
Jiong Wu, MD
Jin-Song Lu, MD
Guang-Yu Liu, MD
Zhen-Zhou Shen, MD
Zhi-Ming Shao, MD
Publication date
01-09-2012
Publisher
Springer-Verlag
Published in
Annals of Surgical Oncology / Issue 9/2012
Print ISSN: 1068-9265
Electronic ISSN: 1534-4681
DOI
https://doi.org/10.1245/s10434-012-2322-6

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