I joined this site because I am desperate to help my sister. She was diagnosed with chair malformation and subsequently had surgery since the anticipated side effects were better than her quality of life. Physically she is doing better, has some good and some bad days. The problem is that she has suffered a complete personality change for the worst and doesn't realize it. We belong to a huge loving family. My sister and I were so close that we couldn't tell where one stopped and the other started. She has alienated herself from the family and has extreme animosity towards us. She began telling outrageous lies and is vicious towards my parents. This behavior could not be more opposite of who she was for 40 years. If anyone has any advice for me please please reply. I am desperate to get my sister back.