Female, 35 years old, with history of breast cancer and metastases to the brain, status post radiotherapy. Since the prior examinations, further interval reduction has occurred in the size of enhancing lesions along the periphery of the cerebellar hemispheres. A lesion along the left inferior paramedian cerebellum now shows only minimal residual enhancement measuring approximately 4 mm whereas it measured 15 mm on 9/11/2015 and 19 mm on 7/9/2015. An enhancing lesion along the right anterior cerebellum is no longer clearly visualized. A lesion along the right lateral cerebellum shows relatively stable size on postcontrast images.The extent of T2 hyperintensity associated with these lesions is similar to that seen on the immediate prior examination and improved relative to 7/5/2015. No new enhancing or nonenhancing lesions are detected. The cerebral hemispheres are within normal limits. A small T1 isointense and T2 hypointense cyst at the foramina of Monro is unchanged. The ventricles are normal in size and morphology.
1.Continued interval improvement is seen in most of the cerebellar metastatic lesions. Several are significantly smaller or no longer clearly identified. One lesion, along the right lateral cerebellum, is unchanged in size.2.No new intracranial lesions are seen. A presumed incidental colloid cyst at the foramina of Monro is unchanged.