Hello I have been reading these posts very interesting. Last jan I had an operation to repair what I was told to be a right knee minicus tear .the operation went fine .after countless physio sessions my knee felt fine.Arpril 25 I started feeling tired .and noticed lumps in my neck and under arm.i went to the doctors and was referred to the ent department for tests.long story short after scan after scan and a biopsy i was diagnosed with stage 3a lymphoma. My consultant placed me on a whatch and wait for three months after my symptoms starting progressing. I started chemotherapy in oct25.but ever since I have been diagnosed my knee pain and swelling has got worse no one has told me that it was in my knees but once I have chemo the swelling and the dull achy pain goes away. I have told my consultant this but she assured me there were no signs of lymphoma in my knees  I just think it's too much of a coincidence not to be. Going to raise this again on my next appointment.