Fig. 21. A. Axial view shows bilateral involvement from metastatic breast carcinoma. An amorphous infiltrative soft-tissue mass is more apparent in the right orbit, which encases the globe, producing clinical and radiographic enophthalmos. Cutaneous melanoma metastatic to the superior rectus muscle is depicted on axial (B) and coronal (C) views. A locally enhancing and asymmetric enlargement is restricted to the right superior rectus muscle. These features distinguish this lesion from Graves' orbitopathy.