VCP and inclusion body myopathy with Paget disease of bone and frontotemporal dementia: A recent work by Jacquin et al. (2013) has showed R155H (464 G>A) mutation of the VCP gene in a French family, led to the Inclusion body myopathy with Paget's disease of the bone and frontotemporal dementia (IBMPFD), with a psychiatric onset of FTD.