Post intravenous contrast administration transverse CT image of a 10-year-old male castrated golden retriever that was diagnosed with a right caudal mandibular malignant melanoma. CT scan shows a heterogeneously contrast enhancing mass arising from the right mandible (m), with secondary retrobulbar extension of the mass (dashed line). There is right ocular exophthalmos (white *), compression of the right zygomatic salivary gland (**) compared to the left (*), and a decrease in retrobulbar fat (darkest gray color in the retrobulbar space).