welcome to healthcare magic
from your description of symptoms, and diagnosis of lymphoid follicular hyperplasia on lab results,
are of two types -
causes of the different types include -
-follicular - rheumatoid arthritis
- idiopathic which is common.
- diffuse - post vaccinal
- anticonvulsant therapy
- viral form of lymphadenitis
i would suggest go back to your oncologist
again and if they can take a biopsy
of the swellings you have it might be of help.
you can get tests done to rule out the causes mentioned above.
hope to have answered your query.
wish you a quick recovery. be strong.