@693c2832: I apologize for not having specific data to back up my previous statement. Upon further research, it appears that there is limited evidence supporting the idea that individuals with NPD can change. However, some studies have shown that certain forms of therapy, such as cognitive-behavioral therapy and psychodynamic therapy, can be effective in reducing symptoms and improving functioning in individuals with NPD. It's important to note that therapy is not a cure and may not work for everyone, and that change ultimately has to come from within the individual.