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Chondrosarcoma(ChSa) is a rare malignant tumor. But it's necessary to discuss the clinical characteristics and treatments for ChSa of paranasal sinus and the skull base. Methods The clinical characteristics of ChSa of paranasal sinus and skull base in 10 patients (6 males and 4 females) from 2001 to 2017 were analyzed. They all underwent by endoscopic surgery . The patients' age ranged from 18 to 47 years, with a median of 35 years. Clinical symptoms: stuffy, nose bleeding, runny, headache,doi:10.21203/rs.2.15283/v1 fatcat:nvzkliffpjcwphqqg3j3bxt7xq