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Selective vulnerability of the hippocampal formation in PART and CTE. (a) Whole mount hemibrain stained for p-tau from a 92-year-old woman with PART showing significant p-tau burden confined to the medial temporal lobe with scant neocortical p-tau (CP13 antisera). (b) A 67-year-old male professional football player with CTE stage 3 with low cortical p-tau burden and scattered cortical lesions (see arrow).
