Abnormal head CT: newly diagnosed metastatic breast cancer. There is an infiltrative, enhancing mass within the left parietal calvarium that measures up to 50 mm with epidural and subgaleal extension. There is minimal associated mass effect upon the underlying left parietal lobe. There is no evidence of lesions with in the brain, brainstem, or cerebellum. There cerebellar tonsils extend up to 5 mm inferior to the foramen magnum. There is no evidence of acute intracranial hemorrhage or acute cerebral infarction. The orbits and paranasal sinuses are unremarkable.
A lesion in the left parietal lobe with epidural and subgaleal extension is compatible with metastatic disease.