Editorial: Components Separation Techniques in Abdominal Wall Surgery

Abstract

Since the first description of the anterior CST by Albanese (1) and its popularization by Ramirez et al.(2), several refinements have been made. Anterior CST enables medialization through external oblique release but requires extensive subcutaneous dissection, resulting in increased wound morbidity. This limitation promoted the transition toward posterior CST, which preserves perforators, minimizes soft-tissue trauma, and allows for retromuscular mesh placement-a strategy associated with improved long-term durability.Posterior CST was further advanced with the introduction of transversus abdominis release (TAR)by Novitsky et al (3). TAR facilitates wide lateral release and creation of a continuous retromuscular plane suitable for large meshes. It has become the preferred method for extensive defects, recurrent hernias, and loss-of-domain cases, demonstrating low recurrence rates between depending on complexity (4).Endoscopic anterior CST represents an important minimally invasive alternative (5). By preserving perforating vessels and avoiding wide subcutaneous flaps, it reduces wound morbidity compared with the open anterior approach. However, its medialization potential remains more limited, and the learning curve is considerable. Additionally, patient selection is more restricted, as severe scarring, prior lateral releases, or large defects may limit its applicability. Nevertheless, when applied appropriately, endoscopic ACS offers a valuable option within the CST armamentarium.A further adjunct increasingly used in complex cases is intraoperative fascial traction (6). Various Optimal outcomes require thorough patient optimization. Obesity, malnutrition, diabetes, smoking, and sarcopenia significantly increase postoperative risk. Prehabilitation-including nutritional support, metabolic control, and physical conditioning-is increasingly recognized as essential.Adjunctive strategies such as botulinum toxin A injections and progressive pneumoperitoneum aid in loss-of-domain scenarios by reducing closure tension and improving abdominal compliance (8).Mesh selection remains a critical element of CST-based reconstruction. Permanent synthetic mesh used in the retromuscular plane provides durable reinforcement in clean settings, while biologic and biosynthetic meshes may be considered for contaminated or high-risk fields. TAR's ability to create a large, vascularized retromuscular space promotes excellent mesh integration and long-term stability.Challenges persist, including variability in surgical technique and inconsistency in terminology, which complicate comparison across published studies. Functional outcomes-such as abdominal wall strength, core stability, and health-related quality of life-remain underreported relative to recurrence. Standardized reporting frameworks and multicenter registries will be essential to refine indications and compare CST techniques.Future developments in CST will likely benefit from advanced imaging, quantitative CT-based reconstruction planning, artificial intelligence-assisted prediction models, and biomaterials such as patient-specific 3D-printed meshes. Integration of these innovations into clinical practice must be guided by robust long-term evidence.In summary, CST has matured into a versatile reconstructive strategy for complex abdominal wall defects. Posterior CST and TAR remain the cornerstone of modern reconstruction, while minimally invasive and endoscopic techniques offer alternative approaches in selected cases. Adjuncts such as intraoperative fascial traction further expand the reconstructive armamentarium. Continued innovation, improved standardization, and emphasis on functional outcomes will be essential for further advancement of the field.