I'm so sorry you're going through this.
Did they mention what kind of radiation they might do? I had a lymph node that lit up on my original PET that was near my spine and out of the surgical area so it got left behind. My post treatment MRIs have shown it as all clear, but before I knew that, I talked about treatment options if it biopsied as cancer. One option was Gamma Knife. When I first read about Gamma Knife, they were only using it on brain tumors. I was surprised that my cancer center was using it on other parts of the body. It is much more focused than the radiation you get with CRT.
I hope your biopsy comes back negative, and it's just something weird.
47yo single mom of 4 (24, 21, 18, 16) at Dx
6/13 - RC T4b IIIc 5LNs on PET CEA 5.4
8/13 - Finish chemorad
10/13 - APR/hyst+ovaries/perm colostomy 2/12 nodes+
6/14 - Finish Xelox 6 rds
1/15 - CT clear CEA 0.2
10/15 - CT/MRI clear CEA 0.7
4/16 - CT clear
10/16 - CT/MRI clear CEA 0.6
5/17 - PET clear? Follow up MRI to verify inflammation