From the sounds of things and given how long this has gone on, I must say she shows signs of improvement.  Instead of getting weaker and weaker she does appear to be rebounding somewhat, and the fact that the neck incision is healing shows good signs that her immune system has not shut down or become over taxed in dealing with toxins and other things wrong inside her.  I do hope she continues to hold her own and get better.   Perhaps more than can be done about the tumor to help her.  It is obvious that she does not consider herself licked by this thing just yet!