Locoregional Breast Cancer Recurrences After Ablatio Mammae and Primary Reconstruction

Area of Science:

• Oncology
• Surgical Oncology
• Breast Cancer Research

Background:

• Breast cancer is a leading cause of cancer death in women globally.
• Surgical options include breast-conserving therapy (BCT) and mastectomy, with reconstruction often following.
• The impact of immediate breast reconstruction on locoregional recurrence (LRR) is not fully understood.

Purpose of the Study:

• To evaluate the impact of primary breast reconstruction on LRR, overall survival (OS), and recurrence-free survival (RFS).
• To compare outcomes between mastectomy with immediate reconstruction versus mastectomy alone.
• To identify risk factors associated with different reconstruction methods.

Main Methods:

• Retrospective population-based cohort study of 2475 women with breast cancer (2004-2018).
• Patients were categorized into: no primary reconstruction, primary autologous reconstruction, primary allogeneic reconstruction, or primary combined reconstruction.
• Kaplan-Meier methods and Cox proportional hazards models were used to assess OS, RFS, and cumulative recurrence rates (CRR), adjusted for covariates.

Main Results:

• Allogeneic reconstruction was associated with significantly improved OS (HR 0.570) and RFS (HR 0.669).
• Autologous reconstruction was linked to higher hazards of LRR and distant metastases compared to no reconstruction.
• Five-year cumulative LRR rates were 5.2% (no reconstruction), 13.5% (autologous), and 4.8% (allogeneic).

Conclusions:

• Immediate allogeneic reconstruction after mastectomy demonstrated favorable survival and recurrence outcomes.
• Autologous reconstruction showed a trend towards higher LRR and distant metastasis rates.
• Findings suggest potential oncologic benefits of allogeneic reconstruction, but require confirmation in prospective studies due to study limitations.