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Updated: Jun 18, 2026
Endoscopic Endonasal Trans-sphenoidal Approach: Minimally Invasive Surgery for Pituitary Adenomas
Published on: January 17, 2018
Challenges and opportunities for new intraoperative optical techniques in the surgical treatment of pituitary
Félix Janelle1, Victor Blanquez-Yeste2,3, Trang Tran2,3
1University of Montreal, Division of Neurosurgery, Department of Surgery, Montreal, Quebec, Canada.
Significance:
Surgery is a common intervention for patients with pituitary adenomas, particularly those experiencing endocrine symptoms or mass effect. Persistent challenges in pituitary surgery include the detection of small microadenomas, difficulty in discerning residual tumor from normal gland, and infiltrative adenomas. Although standard perioperative diagnostics include magnetic resonance imaging (MRI), computed tomography, ultrasound imaging, and neuronavigation, some centers employ intraoperative MRI, ultrasound, and fluorescence-guided endoscopy to increase the rate of gross total resection and preserve pituitary function. However, these techniques are often limited by availability, time requirements, cost, and inability to provide histological diagnosis.
Aim:
This review addresses opportunities to optimize both the extent of resection and gland preservation in pituitary adenoma procedures. We discuss the existing constraints faced in pituitary surgery and showcase the current and emerging detection techniques employed in clinical practice, as well as their limitations. We also discuss newer probing approaches such as elastography and Raman spectroscopy.
Approach:
We outline key attributes for an ideal optical tool, considering surgical theater functionality, ergonomics, and result reliability and accuracy.
Results:
A case study is presented describing the recent development of a fiber-optics instrument specifically designed for endonasal applications based on clinical requirements, along with preliminary data supporting the feasibility of intraoperative implementation.
Conclusions:
Current imaging and navigation tools, although invaluable, have inherent limitations in resolution, integration, and molecular specificity. Raman spectroscopy offers a promising, label-free method for real-time tissue identification, especially when integrated into fiber-optic probes for endonasal use. As a complementary tool, it could enhance intraoperative decision-making and surgical precision. Further clinical validation is needed to support its integration into standard workflows.
Insights
Raman spectroscopy, a label-free optical technique, shows promise for real-time tissue identification during pituitary adenoma surgery. This method, integrated into fiber-optic probes, can improve surgical precision and decision-making, complementing existing imaging tools.
Area of Science:
- Neurosurgery
- Optical Spectroscopy
- Medical Instrumentation
Background:
- Pituitary adenoma surgery faces challenges in detecting small tumors, differentiating residual tumor from normal tissue, and managing infiltrative adenomas.
- Current intraoperative tools like MRI, ultrasound, and fluorescence-guided endoscopy have limitations in availability, cost, and diagnostic specificity.
Purpose of the Study:
- To review current and emerging techniques for optimizing tumor resection and gland preservation in pituitary adenoma surgery.
- To explore the potential of novel probing techniques, including elastography and Raman spectroscopy, for intraoperative use.
Main Methods:
- Discussion of existing constraints and limitations of current diagnostic and navigation tools in pituitary surgery.
- Evaluation of newer probing approaches like elastography and Raman spectroscopy.
- Outline of key attributes for an ideal optical surgical tool.
- Presentation of a case study on a newly developed fiber-optic instrument for endonasal pituitary surgery.
Main Results:
- A fiber-optics instrument for endonasal pituitary surgery has been developed based on clinical requirements.
- Preliminary data suggest the feasibility of intraoperative implementation of this new instrument.
Conclusions:
- Existing imaging and navigation tools have limitations in resolution, integration, and molecular specificity.
- Raman spectroscopy, particularly with fiber-optic probes, offers a promising label-free method for real-time tissue identification in endonasal pituitary surgery.
- Further clinical validation is required for integrating Raman spectroscopy into standard surgical workflows to enhance decision-making and precision.
