Right ethmoid/nasal mass with possible bony erosion: epistaxis. There is a heterogeneously enhancing mass in the posterior right nasal cavity and ethmoid sinuses, which measures up to 5 cm. The tumor extends to the right medial cribriform plate, where there is a dehiscence demonstrated on CT. Otherwise, there is no discernible intracranial extension of tumor. There are trapped secretions and/or hemorrhage in the right sphenoid, ethmoid, and bilateral maxillary sinuses and surrounding recesses, with mild underlying mucosal thickening. There is sclerosis in the bone marrow surrounding the right sphenoid sinus. The orbits are unremarkable.
A mass in the posterior right nasal cavity and ethmoid sinuses that measures up to 5 cm likely represents an neoplasm, such as an inverted papilloma, melanoma, or carcinoma, for example. The tumor extends to the right medial cribriform plate, where there is a dehiscence demonstrated on CT. Otherwise, there is no discernible intracranial or intraorbital extension of tumor. 