Alireza Radmanesh1, Matthew D Wood2, Andrew W Bollen3. 1. New York University School of Medicine, Department of Radiology, Division of Neuroradiology, New York, NY 10016 USA. Electronic address: alireza.radmanesh@nyumc.org. 2. Oregon Health and Science University, Department of Pathology, Portland, OR 97239 USA. 3. University of California San Francisco, Department of Pathology, Division of Neuropathology, San Francisco, CA 94143 USA.