I was operated on 4 years ago for a lung biopsy. When they took a piece of my lung, they also took a lymph node for study. The node never healed on it's own and drained into my chest cavity. They operated again one month later cutting in the same place and suturing the node so it would quit leaking. Recently I have been plagued with swelling and pain around the old incision scar on my left side. Any ideas