@mayo101 Hello!
My screening procedure post mastectomy has been primarily physical doctor exams looking for any lumps (which is ironic because lobular tends to grow in lines, not lumps) but....my current oncologist, who I trust says any new cancer is pretty obvious post mastectomy.....a very clear bump on top of the skin. I did have an ultrasound about 4 years ago because I had a swelling near my armpit and that turned out to be a typical swelling due to a virus. I am going to ask for an MRI however at 10 years and force my insurance to cover it. I too have been with an HMO and they don't like spending any more money on me than they have to (sigh) but I will get Medicare at the end of this year and I will request an MRI just to put my mind at ease if my oncologist feels it is advised. There is really no better way to find any sneaky cancer early than an MRI. Hugs to you!