Orphanet rare-disease nomenclature identifier Orphanet_293848 (Right temporal lobar atrophy) (RTLA) is an anatomic variant of frontotemporal dementia (FTD), characterized by behavioral dysfunction, personality changes, episodic memory loss, and prosopagnosia; attributable to an asymmetrical predominantly right-sided, frontotemporal atrophy. Also known as: Frontotemporal dementia, right temporal atrophy variant, RTLA, rvFTD.