Analysis of the number of neuronal nuclei with hnRNP A2B1 staining (irrespective of the intensity of staining) revealed a significant group‐wide reduction in the numbers of hnRNP A2B1 neuronal nuclei in CA2 in neurodegenerative disease in comparison to controls (p = 0.033, Kruskal–Wallis test, Figure 4F). Here, HNRNPA2B1 is linked to neurodegenerative disease.