NCIt definition : Systematic and extensive loss of memory caused by organic or psychological factors.
The loss may be temporary or permanent, and may involve old or recent memories.;
Alternative definition : CTCAE: A disorder characterized by systematic and extensive loss of memory.; NICHD: Loss of memory.; FDA: Systematic and extensive loss or impairment of memory caused by organic or psychological
factors. This may be temporary or permanent, and may involve old or recent memories.;