GRN and tauopathy: Lastly, the occurrence of several cases of FTLD where an expansion in C9ORF72 is seen in association with either MAPT [27, 28] or GRN[28] mutation suggests this is not likely to be pure chance, and in such cases, either tauopathy or FTLD‐TDP type A histology, typical of the accompanying mutation is present along with the DPR pathology.