Brain mets/scar tissue

Hi,
My orginal brain met from 10/04 was 5mm which I had gamma knife. The lesion or scar tissue is now 1.3 cm by 2 cm. We have been watching it and it has grown in just 8 weeks. The brain PET is to look uptake to gain more information on whether or not it is a reoccurance. The brain MRI w/ profusion is to gain more information as well. The main concern is that it is growing. After all the tests are completed I will go to my neurosurgeon for his opinion. So far I have 3 opinions from RT oncologist and they are puzzled but lean towards it being brain mets. I can go to any NYC doctors you may want to recommend?

When I was orginally diagnosed 5.5 years ago with primary bc I was on A/C and Taxol. I now take Femara and Lupron shots and Herceptin every 3 weeks. I have been doing this for one year. I have always been NED throughout my body. This saga never seems to end although I am still here God willing.