Evaluate left facial mass concerning for left sinonasal malignancy. There is a heterogeneous and infiltrative mass centered in the left sinonasal region, completely obliterating the left maxillary sinus and much of the left nasal cavity and ethmoid sinuses, with extension into the inferior and medial extraconal orbit, abutting the left inferior rectus muscle, and into the overlying left facial subcutaneous tissues with surrounding fat stranding and into the retromaxillary space. There is also compression of the left nasolacrimal duct, with dilatation of the lacrimal sac. Overall, the mass measures up to approximately 7 cm. There are secretions and mucosal thickening in the left frontal sinus and right ethmoid sinuses. The right orbit and paranasal sinuses are unremarkable. There is no significant cervical lymphadenopathy. The salivary glands appear to be grossly intact. There is no evidence of gross intracranial tumor. There is no evidence of acute cerebral infarction, hemorrhage, or ventriculomegaly. There is minimal nonspecific periventricular T2 hyperintensity.
An aggressive mass centered in the left sinonasal region with extension into the extraconal orbit, the overlying left facial subcutaneous tissues, and the retromaxillary space is compatible with a malignant neoplasm. 