 There is a large enhancing mass with heterogeneous T2 hyperintensity and intense heterogeneous enhancement filling the left maxillary sinus and extending medially into the left nasal cavity. There is mass effect on the left middle and inferior turbinates. The mass measures approximately 5.2 x 5.3 x 5.2 cm in the AP, transverse, and craniocaudal dimensions. There is minimal bulging of the left orbital floor without evidence of intraorbital extension. Areas of osseous expansion and dehiscence are better seen on recent CT. Particularly large osseous defect involving the floor of the left maxillary sinus measures up to 2.3 cm in the transverse dimension. No intracranial extension is evident. There is osseous bulging posteriorly of the posterior wall of the left maxillary sinus without findings to suggest tumor invasion into the left masticator space. Minimal opacification of the bilateral anterior ethmoid air cells. Paranasal sinuses are otherwise clear.Visualized brain parenchyma is unremarkable. No intracranial mass or mass effect. No evidence of infarct. No extra-axial collections. No hydrocephalus. No abnormal parenchymal or meningeal enhancement in the brain.MRA neck demonstrates separate origin of the left subclavian artery, left common carotid artery, and brachiocephalic artery from the arch. The common carotid arteries and cervical internal carotid arteries are normal in course and caliber. Both vertebral artery origins are patent. There is no evidence of stenosis or occlusion in the neck. Visualized intracranial circulation is grossly patent.MRA images of the neck only partially include the region of the left maxillary sinus tumor. However no large feeding artery is evident.
1. 5.2 x 5.3 x 5.2 cm left maxillary sinus mass compatible with known neoplasm. There is medial extension into the left nasal cavity. No intraorbital or intracranial extension. Areas of osseous expansion from remodeling as well as dehiscence better appreciated on recent CT. There is particular osseous defect of the left maxillary sinus floor measuring up to 2.3 cm in the transverse plane.2. MRA neck demonstrates patency of the vasculature. Note MRA neck images only partly include region of the maxillary sinus tumor but demonstrate no obvious large feeding artery within the field-of-view. Conventional MRI sequences which do include the left face demonstrate no large flow voids in this region, but if clinically warranted further imaging with CTA or MRA centered at the left maxillary sinus may be considered.