Intraoperative navigation in complex head and neck resections: indications and limits (original) (raw)
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Surgical treatment of maxillary tumours is often highly complex. The three-dimensional anatomy of the mid-face renders both correct intraoperative orientation and adequate oncological safety difficult to obtain. Recently, computer-assisted techniques and intraoperative navigation have been applied to oncological surgery treating head and neck cancer. However, only a few studies have explored whether preoperative virtual resection planning and intraoperative control of resection margins allow assessment of the surgical margins of the tumour. In our present feasibility study, we developed a protocol for preoperative mapping of tumour margins using computed tomography and/or magnetic resonance imaging, virtual planning of the surgical resection, and intraoperative navigation during actual resection of advanced maxillary tumours. Twenty patients were included in this feasibility study. We prospectively selected ten patients requiring surgery to treat malignant maxillary tumours. A contr...
Advances and Innovations in Computer-Assisted Head and Neck Oncologic Surgery
Journal of Craniofacial Surgery, 2012
Over the past years, computer-assisted surgery has gained more importance in craniomaxillofacial surgery, especially in primary and secondary treatment of head and neck malignancies. The basis for oncologic treatment of the head and neck region requires detailed planning using computed tomography, cone-beam computed tomography, or magnetic resonance imaging in combination with computer-assisted, infrared-based navigation system. These techniques allow a preplanned image-guided path to the tumor region for taking biopsies, resection, or reconstruction. The aim of this work was to show the advances and technical benefits for tumor surgery in a daily clinical routine from the view of the craniomaxillofacial surgeon. The target of our working group was to develop and clinically evaluate a novel three-dimensional planning and navigation software solution for treatment of craniofacial tumors. This work was carried out on 5 categories for oncologic surgical procedures in which computer-assisted surgery was applied from 2005 to 2011: preplanned trajectorial-guided tumor biopsy, intraoperative imageYcontrolled tumor resection, tumor mapping, reconstruction after tumor surgery (true to original), and oral rehabilitation (backward planning). Successful preoperative planning, import of image data suitable for navigation, and intraoperative precise infraredbased navigation were obtained for all 5 categories without any complications. Image-guided navigation technique for head and neck oncologic surgery provides a precise, safe surgical method with real-time excellent anatomic orientation. Regarding the advantages of computerassisted surgery, this technique will play a major part in craniofacial reconstructive surgery and will address widespread general methodologic solutions that are of great interest in multidisciplinary oncologic treatment.
Difficulties in the surgical management of head and neck cancer patient
Romanian Journal of Rhinology
Malignancies of the upper aerodigestive tract are high morbidity bearing and life-threatening diseases, which require thorough care from diagnostic suspicion and confirmation to surgical and/or oncologic treatment and rehabilitation. Difficulties in managing head and neck cancers arise from delays in diagnosis and treatment caused by either patient-related factors or healthcare system-related factors. Tumor origin and stage determine whether surgical excision is feasible, the approach required for safe excision, the extent of functional and aesthetic sacrifice required to attain oncologic safety and the need for reconstructive surgery. A thorough and systematic preoperative risk versus benefits assessment to select potential surgical candidates and give realistic outcomes is important from both a medical and a legal point of view. Because tumors in the head and neck region frequently involve more than one system and sensory organ, potential loss of function from either the disease c...
Design and Impact of Intraoperative Pathways for Head and Neck Resection and Reconstruction
Archives of Otolaryngology–Head & Neck Surgery, 2002
To describe the design and impact of 3 intraoperative pathways for the treatment of head and neck cancers; to detail the pathways schematically to illustrate projected intraoperative flow and teamwork; and to analyze impact on procedure and case lengths in each pathway and in comparison with historical prepathway average times. Setting: Tertiary-level academic health system main operating room. Patients: Twenty-one patients undergoing transcervical (TC) resection (n = 11), transmandibular (TM) resection (n=8), or laryngopharyngectomy (LP) (n=2) with radial forearm free-flap reconstruction for ablative or reconstructive reasons were pathway eligible. A convenience sample of 16 patients undergoing TC resection, 7 undergoing TM resection, and 7 undergoing LP prepathway is used for comparison.
Evaluation of image-guidance protocols in the treatment of head and neck cancers
International Journal of Radiation Oncology*Biology*Physics, 2007
Purpose: The aim of this study was to assess the residual setup error of different image-guidance (IG) protocols in the alignment of patients with head and neck cancer. The protocols differ in the percentage of treatment fractions that are associated with image guidance. Using data from patients who were treated with daily IG, the residual setup errors for several different protocols are retrospectively calculated. Methods and Materials: Alignment data from 24 patients (802 fractions) treated with daily IG on a helical tomotherapy unit were analyzed. The difference between the daily setup correction and the setup correction that would have been made according to a specific protocol was used to calculate the residual setup errors for each protocol.
Transoral robotic surgery for the management of head and neck tumors: learning curve
European Archives of Oto-Rhino-Laryngology, 2011
Background. The aim of this prospective study was to determine the technical feasibility, safety, and efficacy of transoral robotic surgery (TORS) for a variety of malignant head and neck lesions. Methods. From April 2007 to November 2007, 20 patients were enrolled in an institutional review board-approved prospective trial using the daVinci surgical robot. Inclusion criteria for the study consisted of adults with early head and neck cancer involving the oral cavity, oropharynx, hypopharynx, and larynx. Results. Twenty patients were included in this study. In 2 cases, access to the tumor was inadequate and the procedure was terminated. In all 18 cases, negative resection margins were achieved. Intraoral reconstruction was performed in 8 patients. Fifteen of 18 patients underwent concomitant unilateral (n 5 10) or bilateral (n 5 5) selective neck dissections. None of the patients required tracheotomy and there were no intraoperative or postoperative complications. The average setup time was 54.6 minutes (range, 140-20 minutes), with a precipitous decrease in the setup time as the study progressed. Conclusion. TORS is a safe, feasible, and minimally invasive alternative to classic open surgery or endoscopic transoral laser surgery in patients with early cancer of the head and neck. With increasing experience, surgical setup as well as operative time will continue to decrease. V
Critical evaluation of frozen section margins in head and neck cancer resections
Cancer, 2006
BACKGROUND.Negative resection margins are likely the most important prognostic factor for a patient with a head and neck squamous cell carcinoma. Frozen-section evaluation allows a positive margin to be corrected before surgical closure and reconstruction. A final pathology report is later issued after examination of all resected tissues. The accuracy of the final pathology report relies on accuracy in the preceding steps. The current process of margin reporting in head and neck cancer resections was studied to reveal possible waste and error in the system.Negative resection margins are likely the most important prognostic factor for a patient with a head and neck squamous cell carcinoma. Frozen-section evaluation allows a positive margin to be corrected before surgical closure and reconstruction. A final pathology report is later issued after examination of all resected tissues. The accuracy of the final pathology report relies on accuracy in the preceding steps. The current process of margin reporting in head and neck cancer resections was studied to reveal possible waste and error in the system.METHODS.Two hundred pathologists were surveyed about their center's current process of frozen-section margin evaluation. The authors of the current study used the membership log of the North American Society of Head and Neck Pathology and the list of the top 50 US cancer centers according to US News and World Report. The authors analyzed the process of frozen-section procedure using Toyota industry principles of quality improvement.Two hundred pathologists were surveyed about their center's current process of frozen-section margin evaluation. The authors of the current study used the membership log of the North American Society of Head and Neck Pathology and the list of the top 50 US cancer centers according to US News and World Report. The authors analyzed the process of frozen-section procedure using Toyota industry principles of quality improvement.RESULTS.The majority of surgeons send small fragments of tissue from the surgical defect cavity. Many pathologists receive small unoriented tissue fragments. Many resample all or most of the margins for the final pathology report without anatomic orientation from the surgeon. Other pathologists do not sample any margins.The majority of surgeons send small fragments of tissue from the surgical defect cavity. Many pathologists receive small unoriented tissue fragments. Many resample all or most of the margins for the final pathology report without anatomic orientation from the surgeon. Other pathologists do not sample any margins.CONCLUSIONS.Final margin reporting redundancy and waste is due mainly to lack of anatomic correlation at interdisciplinary hand-offs. Oversampling and undersampling of margins may be occurring, and the accuracy of the final pathology report may be compromised. There is currently no consensus on how to best submit tissue for frozen-section evaluation of head and neck resection margins. Cancer 2006. © 2006 American Cancer Society.Final margin reporting redundancy and waste is due mainly to lack of anatomic correlation at interdisciplinary hand-offs. Oversampling and undersampling of margins may be occurring, and the accuracy of the final pathology report may be compromised. There is currently no consensus on how to best submit tissue for frozen-section evaluation of head and neck resection margins. Cancer 2006. © 2006 American Cancer Society.
Image guided surgery in the management of head and neck cancer
Oral Oncology, 2016
Complete resection of head and neck tumors relies on palpation and visual inspection. Achieving a negative margin in remote locations in the head and neck region, especially in close proximity to critical structures, is often difficult to achieve. Positive resection margins in head and neck cancer are at high risk to develop recurrent disease and associated with poor prognosis. Near-infrared fluorescence-guided optical imaging is an emerging technology with the potential to move the surgical field forward and facilitate surgeons to visualize tumors in real-time intra-operatively. In this review, our focus is to discuss the recent advances and the potential application of near infrared (NIR) fluorescent-guided surgery in the management of head and neck cancer.
Computer-assisted intraoperative navigation during skull base surgery
American Journal of Otolaryngology, 1996
In patients with diseases of the cranial base, anatomical landmarks are often obliterated by tumor inflammatory diseases or previous surgery. The surgeon may fail to recognize important anatomical structures or tumor margins, increasing the morbidity of the surgery and downgrading the oncological outcome. Materials and Methods: The ISG Viewing Wand is an intraoperative navigational device that uses a position-sensing articulated arm linked to a computer that allows the surgeon to correlate the anatomy of the patient with the computerized display of the reformatted images of preoperative computerized tomography or magnetic resonance. We used the ISG system in 20 patients undergoing skull base surgery for the treatment of tumor inflammatory diseases and trauma. Results: The use of the ISG wand translated into a decreased need for the resection of vital structures and provided reliable mapping of the boundaries of the paranasal sinuses and tumor margins. Conclusion: Intraoperative navigation is a promising technology that complements the surgeon's interpretation of the surgical field. Further refinements of this technology will ease the incorporation of these intraoperative navigation systems into other surgical procedures.