UBQLN2 and frontotemporal dementia: Less frequently, mutations in TANK-binding kinase 1 (TBK1), TAR DNA-binding protein 43 (TARDBP), valosin-containing protein (VCP), sequestosome 1 (SQSTM1) and ubiquilin 2 (UBQLN2) can lead to both familial and sporadic forms of FTD and ALS [8].