Hi, I posted a reply on my post. So sorry your daughter is going through this. Has she had a colonoscopy? Checked her thyroid, thoroughly? Could the mass be an enlarged lymph node? I have low-grade fevers on and off, relentless. I started having inflammation on my face and ears, which sparked all the autoimmune stuff, thinking I might have lupus. I dont, but found out that "rashes" or inflammation, was part of the ebv virus. I cant go to mayo either. I too find doctors dismiss me before they even talk to me.