Cancer Research and Treatment

Original Article

Young Age Is Associated with Increased Locoregional Recurrence in Node-Positive Breast Cancer with Luminal Subtypes: Sang-Won Kim, Mison Chun, Sehwan Han, Yong Sik Jung, Jin Hyuk Choi, Seok Yun Kang, Hyunee Yim, Seung Hee Kang; Cancer Res Treat. 2017;49(2):484-493. Published online August 23, 2016; DOI: https://doi.org/10.4143/crt.2016.246

Purpose
The effects of biological subtypes within breast cancer on prognosis are influenced by age at diagnosis. We investigated the association of young age with locoregional recurrence (LRR) between patients with luminal subtypes versus those with nonluminal subtypes.
Materials and Methods
Medicalrecords of 524 breast cancer patientswith positive lymph nodes between 1999 and 2010 were reviewed retrospectively. All patients received curative surgery and adjuvant chemotherapy based on contemporary guidelines. Radiation was delivered for patients who underwent breast conserving surgery or those who had four or more positive lymph nodes after mastectomy. Adjuvant hormone therapywas administered to 413 patientswith positive hormone receptors according to their menstrual status.
Results
During median follow-up of 84 months, the 10-year locoregional recurrence-free survival rate (LRRFS) was 84.3% for all patients. Patients < 40 years showed significantly worse 10-year LRRFS than those ≥ 40 years (73.2% vs. 89.0%, respectively; p=0.01). The negative effect of young age on LRRFS was only observed in luminal subtypes (69.7% for < 40 years vs. 90.8% for ≥ 40 years; p < 0.01). Multivariate analysis using luminal subtypes ≥ 40 years as a reference revealed luminal subtypes < 40 years were significantly associated with increased risk of LRR (hazard ratio, 2.33; p < 0.01).
Conclusion
Young breast cancer patients with positive lymph nodes had a higher risk of LRR than those aged ≥ 40 years. This detrimental effect of young age on LRR was confined in luminal subtypes.

Citations

Citations to this article as recorded by

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