Mammographic calcification can predict outcome in women with breast cancer treated with breast-conserving surgery

Qi,Xiaomin; Chen,Aoxiang; Zhang,Pei; Zhang,Wei; Cao,Xuchen; Xiao,Chunhua

doi:10.3892/ol.2017.6112

Mammographic calcification can predict outcome in women with breast cancer treated with breast-conserving surgery

Authors:
- Xiaomin Qi
- Aoxiang Chen
- Pei Zhang
- Wei Zhang
- Xuchen Cao
- Chunhua Xiao
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Affiliations: First Department of Breast Cancer, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center of Cancer, Tianjin 300060, P.R. China
Published online on: May 3, 2017 https://doi.org/10.3892/ol.2017.6112
Pages: 79-88
Copyright: © Qi et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

The impact of calcification in patients with breast carcinoma treated with breast‑conserving surgery (BCS) is unclear. The present study aimed to determine the outcome of breast cancer patients with calcification treated with BCS. The records of 409 patients with breast carcinoma treated with BCS from January 2005 to December 2008 were reviewed. Patients were categorized as those with calcification (on mammography or ultrasonography), or those without calcification (neither on mammography nor ultrasonography). The local relapse free survival time (LRFS), disease free survival time (DFS) and overall survival time (OS) were compared, and subgroup analysis was performed based on morphological types and distribution patterns of mammographic calcification. Survival analysis demonstrated that patients with calcification had a significantly increased risk of local recurrence, distant metastasis and mortality compared with those without calcification [relative risk (RR) and 95% confidence interval (CI): local recurrence, 2.46 and 1.11‑5.44; distant metastasis, 2.24 and 1.19‑4.24; mortality, 2.50 and 1.06‑5.86]. Subgroup analysis revealed that the distribution patterns (rather than morphological types of calcification) accounted for the increased risk of recurrence following BCS. Patients with mammographic calcification of liner/segmental distribution had significantly decreased LRFS (RR=6.20; 95% CI, 2.26‑16.98), DFS (RR=6.81; 95% CI, 2.86‑16.20) and OS (RR=9.14; 95% CI, 2.53‑33.00), while patients with mammographic calcification of clustered distribution did not have significantly decreased LRFS, DFS and OS (P>0.05), compared with those without calcification. In addition, the mammographic calcification spreading along the ducts was more likely to be accompanied by an extensive intraductal component (P<0.001). Finally, the outcome of patients with calcification on breast ultrasound was as good as those without calcification. Patients with mammographic calcification, particularly those with calcification spreading along the ducts, have a higher risk of recurrence following BCS, which has a negative impact on long‑term survival. Calcification identified on breast ultrasonography does not affect the survival of patients treated with BCS.

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