Krishna, A., Cheriyil, S., Wilfred, M. and Menon, P. (2026) “Sinonasal angiosarcoma: a rare case of recurrent vascular malignancy managed with endoscopic excision and radiotherapy”, International Journal of Otorhinolaryngology and Head and Neck Surgery, 12(2), pp. 269–271. doi: 10.18203/issn.2454-5929.ijohns20260798.