Legend Sagittal T1, axial fat saturated T2 (top), and axial T1 (bottom) weighted MRI demonstrate a large sino-nasal mass with remodeling of the medial left orbital wall and displacement of the medial rectus muscle. The frontal sinus is filled by the mass and the cribriform plate is not well visualized.

Legend Post contrast axial and coronal T1 weighted MRI with fat suppression reveal a moderately enhancing mass that completely fills the left maxillary sinus, ethmoid sinus, and the left nasal cavity. There is extension of the mass through the medial and inferior wall of the orbit as well as the cribriform plate on the left. Key words: mri tumor neoplasia nose nasal cavity

ENT Diagnosis: Malignant paranasal melanoma