Abstract:Background: Chondrosarcomas are rare non-epithelial malignant tumours. Surgery is the primary treatment option for chondrosarcoma, with adjuvant therapy having a minor role. In cases of nasal chondrosarcoma, however, en bloc total removal by open approaches is often undesirable. Here we report a case of chondrosarcoma arising from the nasal septum, which was resected endoscopically.Case Report: The case was 50-year-old man with nasal stuffiness. Computed tomography revealed a large lesion arising from the nasal septum composed of a low-density area with scattered high-density areas. Grade I chondrosarcoma was diagnosed based on histopathological analysis. After tumour margins were carefully identified on CT images and in the nasal cavities, trans-nasal endoscopic piece-by-piece tumour removal was conducted. One year after the surgery, there was no sign of local recurrence or distant metastasis.Clinical Implication: Transnasal endoscopic removal could represent a safe and potentially curative treatment for this malignant tumour.