<s>[INST] I'm a 66 year old African American male. I had prostate Cancer, of which the cancer was removed robotically in 2010. Recently, I've had  discomfort  in the middle of my back, and some chest discomfort. Some days I have loss of breath going up and down the steps of my home. I must admit, I've been smoking since my teen years, maybe a pack every two weeks. The back discomfort starts when I'm sitting while breathing in and out. Is there something serious going on here; I'm recently retired, and concerned. [/INST] I have studied your case. Prostate cancer can spread to back, and chest also. I would advice you to get a chest X ray, and spine x ray. if x ray does not show any thing than MRI will be helpful. We just want to make sure that your cancer is not spreading there. If every thing comes normal than you can be relax, take medicine for back pain. </s>