Among the cases with post mortem results, 19 were found to have FTLD‐related pathologies: FTLD‐tau = 8 (including 2 with a genetic mutation), FTLD with TPD‐43‐immunoreactive pathology (FTLD‐TDP) = 9 (all 9 cases with a genetic mutation), and FTLD–fused‐in‐sarcoma = 2 (none with a genetic mutation). The gene discussed is MAPT; the disease is sarcoma.