Have had the same lymph nodes swollen for about 3 years. All blood work is normal except diff segs is at 48.1. No doc is concerned about it. Lymphoma?

No. Julia, the big nodes are either scarred up from a big battle in which they fought off invaders successfully, or just a big fortress to protect you. Lymphoma nodes are obviously abnormal and don't stay stable. Every teen and young adult have a few of these -- you're probably just a better observer of your body. Seg diffs fluctuate chaotically from hour to hour -- ignore the %. Best wishes.