A Comparison of Spectroscopy and Imaging Techniques Utilizing Spectrally Resolved Diffusely Reflected Light for Intraoperative Margin Assessment in Breast-Conserving Surgery: A Systematic Review and Meta-Analysis

Up to 19% of patients require re-excision surgery due to positive margins in breast-conserving surgery (BCS). Intraoperative margin assessment tools (IMAs) that incorporate tissue optical measurements could help reduce re-excision rates. This review focuses on methods that use and assess spectrally resolved diffusely reflected light for breast cancer detection in the intraoperative setting. Following PROSPERO registration (CRD42022356216), an electronic search was performed. The modalities searched for were diffuse reflectance spectroscopy (DRS), multispectral imaging (MSI), hyperspectral imaging (HSI), and spatial frequency domain imaging (SFDI). The inclusion criteria encompassed studies of human in vivo or ex vivo breast tissues, which presented data on accuracy. The exclusion criteria were contrast use, frozen samples, and other imaging adjuncts. 19 studies were selected following PRISMA guidelines. Studies were divided into point-based (spectroscopy) or whole field-of-view (imaging) techniques. A fixed-or random-effects model analysis generated pooled sensitivity/specificity for the different modalities, following heterogeneity calculations using the Q statistic. Overall, imaging-based techniques had better pooled sensitivity/specificity (0.90 (CI 0.76-1.03)/0.92 (CI 0.78-1.06)) compared with probe-based techniques (0.84 (CI 0.78-0.89)/0.85 (CI 0.79-0.91)). The use of spectrally resolved diffusely reflected light is a rapid, non-contact technique that confers accuracy in discriminating between normal and malignant breast tissue, and it constitutes a potential IMA tool.

Reverse Abdominoplasty: A Novel Practical Approach Using Oncoplastic Reconstruction in Managing Major Chest Wall Defects for Patients With Loco-Regional Recurrence Following Breast Cancer Surgery

Background

Loco-regional recurrence of breast cancer in patients with large chest wall defects following mastectomy poses significant oncoplastic challenges. Reverse abdominoplasty is most commonly used to treat patients with excess upper abdominal soft tissue and laxity following massive weight loss. Widely employed as a technique for aesthetic contouring of the upper anterior trunk, as well as in augmentation mammoplasty, its use to date for reconstructive purposes is mainly limited to burns and large site surgical tumour ablation.

Method

Here we review our experience of using reverse abdominoplasty as a novel approach to filling major anterior chest wall defects in patients with cutaneous manifestations of loco-regional or distant recurrence of breast cancer.

Results

Seven patients with metastatic breast cancer underwent reverse abdominoplasty for disease recurrence following mastectomy, with good patient-reported outcomes, and minimal surgical complications. Moreover, follow-up data in the patients surveyed also showed minimal to no limitations on their activities of daily living following the procedure.

Conclusion

Here we demonstrate the successful employment of reverse abdominoplasty - a technique not usually reserved in breast oncoplastic surgery - to treat fungating breast lesions and/or other manifestations of loco-regional recurrence in metastatic breast cancer. This may herald a paradigm shift in the way surgeons approach breast cancer recurrence in patients with pre-existing major chest wall defects.

Trauma Care in Low- and Middle-Income Countries

Background  Trauma-related injury causes higher mortality than a combination of prevalent infectious diseases. Mortality secondary to trauma is higher in low- and middle-income countries (LMICs) than high-income countries. This review outlines common issues, and potential solutions for those issues, identified in trauma care in LMICs that contribute to poorer outcomes.

Methods  A literature search was performed on PubMed and Google Scholar using the search terms “trauma,” “injuries,” and “developing countries.” Articles conducted in a trauma setting in low-income countries (according to the World Bank classification) that discussed problems with management of trauma or consolidated treatment and educational solutions regarding trauma care were included.

Results  Forty-five studies were included. The problem areas broadly identified with trauma care in LMICs were infrastructure, education, and operational measures. We provided some solutions to these areas including algorithm-driven patient management and use of technology that can be adopted in LMICs.

Conclusion  Sustainable methods for the provision of trauma care are essential in LMICs. Improvements in infrastructure and education and training would produce a more robust health care system and likely a reduction in mortality in trauma-related injuries.