Many other neurodegenerative conditions are associated with Frontotemporal degeneration .  Some conditions, such as Amyotrophic Lateral Sclerosis, can co-occur with FTD.  Other conditions are frequently confused with forms of Frontotemporal degeneration , and this includes early-onset variants of Alzheimer's disease.  Yet other conditions share features with some forms of Frontotemporal degeneration , such as Lewy body disease and other variants of Parkinson's disease.