Conclusion:
It was a rare case of sinonasal sarcoma of aggressive nature that was completely occupying nasal cavity and paranasal sinuses with bony erosions. CT scan and MRI was suggesting a highly aggressive mass with intracranial extension (extrdural). The mass was also abutting the internal carotid artery with its 90% circumference and was labelled as an unresectable mass and patient was referred for radiotherapy.