Dementia and elder abuse. 
Dementia and elder abuse are relatively common and under-diagnosed geriatric syndromes.  A unique relationship is observed when the two entities coexist.  Special issues can confound the care of the dementia patient suspected of being abused.  Impaired language or motor abilities to communicate abusive situations to a third party, lack of decisional capacity to address the abusive situation, disinhibited behavior that contributes to a cycle of violence, and coincident depression of the abused elder complicate the diagnosis and management of elder abuse.  Education of the caregiver and attention to caregiver stress, including depression, may prevent onset and perpetuation of abuse.