I finished chemo June 26, and had my last appointment with the oncologist about three weeks later. Now I am having radiotherapy, but I have been told that I won't see my oncologist again for 6 months, and then will be seen by her every six months, so perhaps this is the norm?
In your mother's case I should have thought that somebody should be following her more closely if she still has open wounds, otherwise I suppose 6 months is ok if she is no longer having any active treatment?
Unfortunately it is her prerogative to decline treatment or go to a snake oil specialist or whomever, despite how ridiculous it may seem to you. You could try talking to the breast health clinic or her oncologist though .... nothing ventured, nothing gained!
It must be a horribly difficult time for you and those who love her! 😞