Figure 1

CT images in soft tissue window showing mass in ethmoid sinus and nasal cavity extending into the left orbit. A &B: Axial section CT image showing heterogeneously enhancing soft tissue density mass in bilateral ethmoid sinuses and both nasal cavities with bony destruction and extension into left orbit causing proptosis. C &D: Axial and coronal section CT images showing lateral extension of the mass into left infratemporal region with destruction of the postero-lateral wall of left maxillary sinus.