Minimally invasive laryngeal surgery is entering a new phase in which the central goal is no longer simply to remove diseased tissue, but to preserve and, when necessary, reconstruct the delicate functions that allow people to speak, breathe and swallow. A review published in ENT Discovery describes how advances in digital imaging, energy-based surgical devices and robotic platforms are reshaping procedures involving the larynx and neighboring upper-airway structures. The shift reflects a broader transformation in modern head and neck surgery: instead of relying on broad exposure and extensive tissue removal, surgeons are increasingly using high-resolution visualization and highly controlled instruments to target abnormalities while protecting healthy anatomy. These approaches are particularly important in the larynx, where millimeters can determine whether a patient retains a clear voice, normal airway function and an acceptable quality of life after treatment.
One of the most important developments highlighted in the review is the growing role of high-definition endoscopy combined with narrow-band imaging, or NBI. This optical technology uses selected wavelengths of light to enhance the appearance of superficial blood vessels, which can become irregular or more prominent around early neoplastic changes. By increasing the visual contrast between normal and abnormal mucosa, NBI can help clinicians identify subtle lesions that may be difficult to distinguish under conventional white light. The technique is sometimes described as an “optical biopsy” because it can guide the clinician toward suspicious areas before tissue is removed for histopathological confirmation. It does not replace laboratory examination, but it can improve lesion mapping, support earlier detection and help surgeons define the boundaries of a procedure with greater precision.
The review also examines the evolution of laser surgery, a technology that has become central to transoral treatment of selected laryngeal lesions. Modern laser systems can deliver energy in tightly controlled patterns, allowing surgeons to cut, vaporize or coagulate tissue while limiting damage to surrounding structures. This precision is especially valuable on the vocal folds, where excessive thermal injury can lead to scarring and permanent changes in vibration. The characteristics of the laser beam, including its wavelength, pulse duration and energy density, influence how deeply energy penetrates tissue and how much heat is transferred beyond the target. By adjusting these parameters, surgeons can tailor treatment to the biological behavior and location of a lesion, potentially reducing postoperative inflammation and shortening recovery.
Low-temperature coblation is presented as another energy-based option that may expand the range of minimally invasive treatment. Unlike conventional thermal instruments, coblation uses a plasma field generated in a conductive medium to break molecular bonds at relatively low temperatures. The lower operating temperature is intended to reduce collateral thermal damage, an advantage in anatomically confined regions such as the larynx and hypopharynx. Although the clinical role of coblation depends on the disease being treated and the surgeon’s experience, its ability to remove or reshape tissue with limited heat production has attracted interest in airway surgery. The review places this technology within a larger trend toward devices that offer more predictable tissue effects and better control over the balance between resection, hemostasis and preservation of function.
Robotic surgery is extending this precision into areas that can be difficult to reach through conventional transoral approaches. Transoral robotic surgery, or TORS, uses an articulated camera and miniature instruments that can be manipulated from a control console. The system can provide magnified three-dimensional visualization, tremor filtration and multiple degrees of instrument movement, features that may be useful when operating in narrow or angled spaces. New flexible and single-port robotic platforms are being developed to address limitations created by the rigid geometry of earlier systems. According to the review, these advances could improve access to hard-to-reach sites, including selected subglottic and hypopharyngeal regions. By entering through natural openings rather than external incisions, robotic techniques may also reduce visible scarring and limit disruption of surrounding soft tissues.
However, the significance of minimally invasive laryngeal surgery is measured not only by how much tissue can be removed through a small access route. Increasingly, surgeons are focusing on functional reconstruction, particularly when disease or previous treatment has damaged the vocal folds. The vocal folds generate sound through rapid, coordinated vibration, and even small disruptions to their layered structure can produce severe hoarseness. The review describes refinements in microflap surgery, a technique designed to separate and preserve the superficial layers of the vocal fold while allowing access to lesions beneath the surface. By maintaining the vibratory epithelium and minimizing unnecessary disruption of the underlying lamina propria, optimized microflap procedures seek to improve the mechanical conditions required for normal phonation.
Autologous tissue grafting is also being explored for challenging disorders such as vocal fold scar and sulcus vocalis. In vocal fold scarring, the normally flexible tissue layers become stiff, reducing the amplitude and regularity of vibration. Sulcus vocalis, a furrow or groove along the vocal fold, can similarly interfere with efficient sound production and may be difficult to correct with simple excision. Grafts made from a patient’s own tissue may be used to restore volume, separate abnormal tissue planes or improve the pliability of the vocal fold. The success of these procedures depends on careful patient selection, precise placement and the biological behavior of the graft after implantation. The review suggests that functional outcomes are becoming a central measure of success alongside disease control and anatomical healing.
The applications described extend beyond vocal fold lesions and voice reconstruction. Minimally invasive methods are being investigated for laryngotracheal stenosis, a narrowing of the airway that can result from intubation, trauma, inflammation, surgery or other causes. Treatment may involve endoscopic incision, dilation, tissue removal or the use of energy devices, with the aim of restoring airflow while avoiding additional injury that could promote recurrent scarring. The review also notes the expanding use of these approaches for congenital neck lesions. In such cases, less disruptive access may be particularly valuable because surgeons must account for small anatomical spaces, developing tissues and the long-term effects of treatment. These applications demonstrate how endoscopic and image-guided methods are moving beyond traditional tumor surgery into complex structural and developmental conditions.
Future progress may depend on biological materials and computational assistance as much as on improved instruments. Tissue-engineered injectable materials are being studied as potential tools for repairing or augmenting damaged laryngeal structures. Such materials could be designed to provide temporary mechanical support, encourage tissue integration or deliver biological signals that promote healing. The ideal injectable material would need to match the movement and flexibility of the vocal fold while remaining biocompatible and stable enough to produce a meaningful functional benefit. At the same time, artificial intelligence is beginning to attract attention as a support system for intraoperative navigation. Algorithms could eventually assist with image interpretation, lesion boundary recognition, surgical planning and real-time orientation, although reliable clinical implementation will require extensive validation, standardized data and safeguards against inappropriate automation.
Despite the promise of these technologies, the review emphasizes that minimally invasive laryngeal surgery still faces substantial barriers. Robotic systems may provide sophisticated visualization and instrument control, but many currently offer limited or no direct haptic feedback, making it harder for surgeons to judge tissue resistance by touch. High equipment costs can restrict adoption, while maintenance requirements and specialized training add to the financial burden. The learning curve is also steep: surgeons must master new interfaces, understand the tissue effects of advanced energy devices and develop strategies for managing complications within narrow anatomical spaces. The authors call for integrated and cost-effective solutions that combine imaging, energy delivery, robotics, reconstruction and decision support. If these challenges can be addressed, minimally invasive laryngeal surgery may become more widely available while preserving the functions that matter most to patients.
Subject of Research: Not applicable
Article Title: Advances in Minimally Invasive Laryngeal Surgery
Web References: http://dx.doi.org/10.15302/ENTD.2026.060005
Keywords: Minimally invasive laryngeal surgery; digital imaging; narrow-band imaging; laser surgery; coblation; transoral robotic surgery; vocal fold scar; sulcus vocalis; laryngotracheal stenosis; tissue engineering; artificial intelligence; Cell biology
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