The vast majority of chondrosarcomas of the skull (CS) are located at the skull base and represent locally aggressive malignant tumors that account for 0.15% of all intracranial neoplasms. Complete surgical resection with wide surgical margins is currently the main treatment strategy, but can be hard to achieve due to the complex anatomy of the head and neck. The jugular foramen, situated in the floor of the posterior fossa and posterolaterally to the petro-occipital suture, is a remarkably rare location for CS. A case of primary CS of the jugular foramen in a 65-year-old patient is reported, presenting with otalgia, pulsatile tinnitus, and mild hearing loss in the left ear, accompanied by peripheral facial nerve paresis. Radiographic imaging showed a mass in the left mastoid, middle ear and jugular fossa with bone destruction of the jugular fossa and mastoid, while magnetic resonance imaging showed additional involvement of the petroclival fissure, hypoglossal canal, jugular bulb, and sigmoid sinus. The tumor was resected with wide margins through a Fisch infratemporal fossa approach type A, followed by radiotherapy. Results of the immunophenotyping along with histological features primarily matched moderately differentiated chondrosarcoma. The patient is recurrence free at 6 months after treatment. Middle ear discharge with facial palsy as a first manifestation of the CS has not been described to date. The unique localization, treatment details and histopathologic data are relevant in expanding the current level of knowledge on the subject.Cite this article as: Prnjak J, Košec A, Pegan A, Gregurić T, Ajduk J. Chondrosarcoma of the jugular foramen: A case report. J Int Adv Otol. 2025, 21(2), 1362, doi: 10.5152/iao.2025.231362.

Background/Objectives: The study aims to analyse the factors associated with positive margins and endoscopic understaging in laryngeal carcinoma. It also aims to assess the diagnostic accuracy of Narrow Band Imaging (NBI) in comparison to White Light Endoscopy (WLE) and other diagnostic methods. Methods: In this retrospective comparative cohort analysis, 206 patients who underwent endoscopic laser surgery for T1 and T2a glottic squamous cell carcinoma between 1 January 2016 and 30 April 2023 were included. The data were collected from endoscopy, CT, histopathology, and NBI images. Statistical analysis was performed and associations between variables were analysed using binary logistic regression and receiver operating characteristic analysis. Results: The types of cordectomy performed included type III (51 patients), type IV (40 patients), and type VI (23 patients). Positive margins were found in 14.01% of patients, with significant correlations observed between positive margins and bilateral laryngeal carcinoma, right-sided laryngeal carcinoma, higher clinical and histopathologic T categories, and higher NBI grade. Endoscopic understaging versus histopathologic T category correlated with various factors, including cordectomy type, tumour size, and clinical T category. The NBI findings correlated with positive margins but did not correlate with endoscopic understaging. Conclusions: The study highlights several clinical and pathological factors associated with positive margins and endoscopic understaging in laryngeal carcinoma. NBI demonstrated high diagnostic accuracy, correlating with histopathological results and serving as an independent predictive factor for positive margins. Recognizing these factors is crucial for improving preoperative assessments, refining treatment strategies, and enhancing patient care.