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Breast cancer metastatic to the sphenoid and ethmoid bones with direct extension into the orbital apex (CT)

Axial CT section through the orbits displayed in bone window. A permeative partially osteoblastic metastasis involves the sphenoid and the ethmoid bones on the right. Direct extension of abnormal soft tissue from this bony lesion into the orbital apex occurs, resulting in proptosis and orbital apex syndrome. (Contributed by Dr. Zubair Shaikh.)