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hondrosarcoma of head and neck is a very rare tumor. Ïn this article a single case referred to Ë.N.T. department of Rasoul-e-Âkram hospital is being reported. Ân extensive tumor which involved nasal, posterior ethmoidal sinuses, sphenoid and intracranial regions which could cause a difficulty in its treatment. Delay in consultation and diagnosis could be the reasons for massive extention of the tumor. The most important symptoms are nasal block and epistaxis and the treatment is complete resection by a selective surgery.