Hello Patty,   Sorry for the delay in a relay, as I'm at a loss for what can legally be done to enforce medical as opposed to psychiatric treatment.   You are going through something difficult so I hope you do read this e-mail and respond to me.   I have a hunch that perhaps since your sister's schizophrenia symptoms aren't adequately under control, that is the first course of action: managing her illness so that she has the ability to comphrehend that medical treatment is necessary for the cancer.   As you hinted, she will not allow you to talk to the psychiatrist.  I gather that because of this, he will not talk to you.  If you send me a private e-mail to my SchizophreniaConnection e-mail, I will try to send you a list of questions you can ask a  psychiatrist without breaking confidentiality.  The list was sent to me by a close friend.   Call NAMI at (800) 950-NAMI (6264) to find a local affiliate in your area, if you would like to take the Family-to-Family 12-week course, where you will get information about how to cope with the realities of having a loved one with a mental illness.  For now, I will search my outdated e-mails and see if I can find the list of questions, and if they're no longer there, I"ll ask my friend to e-mail them again.   I wish you and your sister the best.   Regards, cb