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Prostatic cancer metastatic to the sphenoid bone (CT)

Axial CT section through the orbits displayed in bone window. A focal, well-defined osteoblastic metastasis (arrow) expands the bone to distort the lateral rectus muscle and optic nerve. Such well-defined osteoblastic lesions are common in metastatic prostate cancer. (Contributed by Dr. Zubair Shaikh.)