Ophthalmic manifestations of an undifferentiated sinonasal carcinoma.

Introduction: Sinonasal undifferentiated carcinoma (SNUC) are uncommon, highly aggressive neoplasms arising in the nasal cavity and paranasal sinuses. Unlike the majority of sinonasal carcinomas, SNUC possess an uncertain histological origin and pleomorphic composition. Their heterogeneous composition prohibits their distinction from other more commonly encountered nasal tumors on the basis of imaging alone.