Supporting the possible relationship of the observed subtype-specific iron differences to varying tau pathologies, 19 PSP-RS patients’ brains showed a strong correlation with iron and tau levels in the cerebellar dentate, and 10 PSP-P patients’ brains showed a strong correlation with iron and tau levels in the putamen, subthalamic nucleus, and the red nucleus [87]. Here, MAPT is linked to X-linked retinoschisis.