question: I have swollen lymph nodes in my left clavical area that have been growing for almost 2 years. They have pushed my collar bone out. I can tell when they are expanding because it is very painful. I feel this same pain periodically in my head behind and above my left ear. My chest and back under my collar bone on the left side, then in my left upper hip right above my buttocks. It has moved to the top of my left femur on the surface I can feel them with my hand. A few weeks ago I feel the same pain on the outside of my left knee. I have a tumor on my upper hip area where the pain is I noticed in July, and a tumor in my left fore arm in September. What tests do you recommend for a proper diagnosis?