MAPT and prion disease: Expanded access to real‐time quaking‐induced conversion (RT‐QuIC) assays capable of detecting small amounts of prions in patient specimens has enabled antemortem diagnoses with high sensitivity and specificity—particularly when interpreted together with other established markers of prion disease, including CSF total tau (T‐Tau) and brain MRI.4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15