I am double seronegative as well. My doctor did a cat scan anyway. The thymus appeared to be normal. The problem is that the whole CT scan opened another can of worms. I had two small masses in my left lung. I am not a smoker, or they would have insisted on immediate surgery. They were too small to biopsy and my pulmonologist did not think it was worth splitting my chest open on account of them. Instead I had a repeat CT scan in 6 months. There was no change. I have another follow up in 6 more months.

If it is anything bad, I guess this cellcept I started on will help it go ahead and grow it enough to figure it all out.......