Abstract
We report a case of a squamous cell carcinoma of the right tonsillar region with 5 metastatic lymph nodes and a retropharyngeal metastasis, the latter detected in the preoperative MRI scan. The treatment consisted of excision of the tumor in the oral cavity and the bilateral neck dissection. Despite careful exploration, a retropharyngeal metastasis was not identifiable during this procedure. This failure encouraged us to use navigation-guided surgery in a second step. The difficulty in using navigation in soft tissue of the neck is the fixation of the neck. Therefore, a thermoplastic head mask, normally indicated in radiation therapy, was used for both the preoperative CT and navigation-guided surgery. The retropharyngeal metastasis was successfully excised with this method. This is the first reported attempt to use navigation-guided surgery in the soft tissue of the neck. It reveals new opportunities for navigation in the future.
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