Soft tissue lesion inside the sphenoid and ethmoid sinus extends into the left maxillary sinus with a permeative pattern at this level, and it also extends into the left nasal fossa and left frontal sinus with partially defined margins and heterogeneous enhancement after intravenous contrast application . This lesion erodes the maxillary bones, medial wall of the left orbit, left lesser wing of the sphenoid and sella turcica. Involves the extraconal space of the left orbit and causes thickening of the medial rectus muscle.