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Related Experiment Video

Updated: Jan 8, 2026

Endoscopic Bilateral Nipple-sparing Mastectomy via a Single Axillary Incision with Immediate Pre-pectoral Implant-based Breast Reconstruction
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Defining BMI Thresholds for Free Flap Reconstruction Following Nipple-Sparing Mastectomy.

Salman Khan1, Mehdi S Lemdani1,2, Dustin Crystal1

  • 1Division of Plastic Surgery, Department of Surgery, University of Pennsylvania, Philadelphia, Pennsylvania, USA.

Microsurgery
|December 13, 2025
PubMed
Summary
This summary is machine-generated.

Autologous breast reconstruction (ABR) after nipple-sparing mastectomy (NSM) is safe across most body mass index (BMI) values. Higher BMI thresholds indicate increased complication risks, guiding surgical planning and patient counseling for optimal outcomes.

Keywords:
autologous reconstructionbody mass indexnipple necrosisnipple‐sparing mastectomyobesity

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Area of Science:

  • Plastic Surgery
  • Oncology
  • Surgical Outcomes

Background:

  • Autologous breast reconstruction (ABR) following nipple-sparing mastectomy (NSM) offers superior aesthetics but faces debated body mass index (BMI)-based recommendations due to complication risks.
  • Optimal BMI cutoffs for ABR after NSM require further definition to mitigate perioperative risks.

Purpose of the Study:

  • To assess postoperative outcomes in relation to BMI for patients undergoing ABR after NSM.
  • To define optimal BMI thresholds for free flap breast reconstruction following NSM to minimize complications.

Main Methods:

  • Retrospective review of 301 patients (466 breasts) undergoing free flap breast reconstruction post-NSM (2005-2024).
  • Risk-adjusted logistic regression and ROC curves analyzed BMI as a predictor of complications, with Youden's Index identifying optimal BMI cutoffs.

Main Results:

  • Median BMI was 27.8 kg/m²; complications included nipple areolar complex (NAC) necrosis (4.8%, BMI cutoff 37.6), seroma (1.7%, BMI 41.1), hematoma (3.4%, BMI 39.2), and skin necrosis (11.8%, BMI 34).
  • Flap loss due to vascular complications occurred in 0.9% of patients, with a BMI cutoff of 43.2.

Conclusions:

  • BMI is a significant factor in postoperative complications after NSM with ABR.
  • ABR following NSM is generally safe, but very high BMI values correlate with increased risks.
  • Established BMI thresholds can enhance patient counseling, surgical planning, and optimize outcomes, reducing morbidity.