label: Biphenotypic Sinonasal Sarcoma
label_lc: biphenotypic sinonasal sarcoma
description: A rare, slow-growing, low-grade soft tissue sarcoma arising from the sinonasal tract. It presents with non-specific obstructive nasal symptoms. Morphologically, it is an infiltrative, cellular spindle cell neoplasm. It is associated with rearrangement of the PAX3 gene.