23 years, Male, yolk sac tumor, brain metastases. There is a 3 x 2 mm right lateral medullary enhancing lesion which is slightly smaller than on prior study from 12/16/2015 and more clearly decreased in size since 8/6/2015. There is no new or enlarging mass or focus of abnormal parenchymal or meningeal enhancement. Additional treated lesions including the right frontal lobe, left posterior temporal lobe, and inferior right cerebellum seen on earlier study from 8/6/2015 again demonstrate no enhancement; there is residual susceptibility effect compatible with chronic blood products or mineralization at the prior lesions as seen before.No evidence of acute infarct or hemorrhage. Ventricles and sulci are normal in size. No midline shift or herniation. No extra-axial collections. Calvarium is intact. Diffuse opacification of the right mastoid air cells is again seen.
Slight further decrease in size of the residual right lateral medullary lesion. No new or enlarging lesions to suggest disease progression.