cT4N1M0 squamous cell carcinoma of the left maxillary sinus. There is a bulky 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 globe, 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 portions of the bilateral ethmoid sinuses. The left optic nerve is intact. The right orbit is unremarkable. There is a partly imaged prominent left level 1B lymph node. The salivary glands appear to be 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.
1. A large, aggressive mass centered in the left sinonasal region with extension into the left extraconal orbit, the overlying left facial subcutaneous tissues, and the retromaxillary space is compatible with a squamous cell carcinoma. 2. Partly imaged prominent left level 1B lymph node. Please refer to the prior neck MRI for additional details.