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Background <p>Breast-conserving therapy (BCT), combining breast-conserving surgery (BCS) and radiotherapy (RT), is a standard treatment for early stage breast cancer. Despite its effectiveness, patients remain at risk for ipsilateral breast tumor recurrence (IBTR). While mastectomy is traditionally recommended for IBTR, a second BCS with reirradiation (ReRT) has emerged as an alternative. However, there are limited data on outcomes for second BCS without ReRT in low-risk patients. This study aims to assess the outcomes of second BCS without ReRT in patients with low-risk IBTR.</p> Patients and Methods <p>This retrospective cohort study included patients with low-risk IBTR who underwent second BCS without ReRT at the Curie Institute between 2001 and 2023. Eligible patients had hormone receptor-positive, HER2-negative tumors with low histological grade and a size ≤ 2 cm without evidence of lymph node involvement. Data were collected on local recurrence-free survival (LRFS), metastatic recurrence-free survival (MFS), and overall survival (OS).</p> Results <p>Among 154 patients who underwent second BCS without ReRT, 119 had invasive carcinoma and 35 had ductal carcinoma in situ (DCIS). Over a median follow-up of 50 months, 11 patients (7.1%) experienced a second local recurrence, and 6 patients (3.8%) developed metastatic recurrence. Of these 6 metastatic cases, only 2 were associated with synchronous local recurrence. Importantly, no deaths were attributed to breast cancer in this cohort, highlighting the viability of this approach in low-risk patients. Overall survival at 36 months was 98% for invasive carcinoma and 100% for DCIS.</p> Conclusions <p>Second BCS without ReRT offers favorable outcomes with low rates of recurrence and metastasis and no breast-cancer-specific mortality in selected low-risk IBTR patients, providing a viable alternative to mastectomy. Further studies with longer follow-up are necessary to confirm these findings and evaluate their applicability in higher-risk populations.</p>

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Outcomes of Second Breast-Conserving Surgery Without Reirradiation for Breast Tumor Recurrence

  • 期刊论文

  • 发表日期：

    2026年1月6日

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  • Thomas Gaillard,
  • Arnaud Beddok,
  • Yousrah Baadj,
  • Jean-Guillaume Feron,
  • Lauren Darrigues,
  • Léa Pauly,
  • Beatriz Grandal Rejo,
  • Hélène Didelot,
  • Charlotte Van Coppenolle,
  • Fabien Reyal,
  • Enora Laas

摘要

Background

Breast-conserving therapy (BCT), combining breast-conserving surgery (BCS) and radiotherapy (RT), is a standard treatment for early stage breast cancer. Despite its effectiveness, patients remain at risk for ipsilateral breast tumor recurrence (IBTR). While mastectomy is traditionally recommended for IBTR, a second BCS with reirradiation (ReRT) has emerged as an alternative. However, there are limited data on outcomes for second BCS without ReRT in low-risk patients. This study aims to assess the outcomes of second BCS without ReRT in patients with low-risk IBTR.

Patients and Methods

This retrospective cohort study included patients with low-risk IBTR who underwent second BCS without ReRT at the Curie Institute between 2001 and 2023. Eligible patients had hormone receptor-positive, HER2-negative tumors with low histological grade and a size ≤ 2 cm without evidence of lymph node involvement. Data were collected on local recurrence-free survival (LRFS), metastatic recurrence-free survival (MFS), and overall survival (OS).

Results

Among 154 patients who underwent second BCS without ReRT, 119 had invasive carcinoma and 35 had ductal carcinoma in situ (DCIS). Over a median follow-up of 50 months, 11 patients (7.1%) experienced a second local recurrence, and 6 patients (3.8%) developed metastatic recurrence. Of these 6 metastatic cases, only 2 were associated with synchronous local recurrence. Importantly, no deaths were attributed to breast cancer in this cohort, highlighting the viability of this approach in low-risk patients. Overall survival at 36 months was 98% for invasive carcinoma and 100% for DCIS.

Conclusions

Second BCS without ReRT offers favorable outcomes with low rates of recurrence and metastasis and no breast-cancer-specific mortality in selected low-risk IBTR patients, providing a viable alternative to mastectomy. Further studies with longer follow-up are necessary to confirm these findings and evaluate their applicability in higher-risk populations.