Breast Capsule Thickness and Clinical Capsular Contracture: A Systematic Review and Meta-Analysis

Area of Science:

• Plastic Surgery
• Biomedical Engineering
• Pathology

Background:

• Capsular contracture is a common complication following breast augmentation, often requiring revision surgery.
• Identifying predictors for capsular contracture is crucial for improving patient outcomes.

Purpose of the Study:

• To analyze the association between breast capsule thickness and the severity of capsular contracture.
• To determine if capsule thickness can serve as a measurable predictor for pathological contracture.

Main Methods:

• A systematic literature review was performed using PRISMA guidelines across major databases (PubMed, Medline, Web of Science) for studies published between 2014 and 2024.
• Data extraction included capsule thickness, contracture presence, and Baker score. Statistical analyses involved meta-regression, permutation testing, and univariate Poisson regression.

Main Results:

• Twelve studies encompassing 590 breast samples were analyzed, revealing a mean capsule thickness of 708 µm.
• A pooled capsular contracture rate of 58.2% was observed. Higher tertiles of capsule thickness showed significantly increased odds of contracture (OR 23.99 for highest tertile).
• A minimum significant cutoff of 601.5 µm was identified, below which contracture rates were significantly lower. Each micrometer increase in thickness correlated with a 0.069% increase in contracture risk.

Conclusions:

• Breast capsule thickness is a significant and measurable predictor of capsular contracture.
• This finding aids in distinguishing benign from pathological contracture and may inform surgical management strategies.