After a traumatic experience involving my mother a couple of years ago, my best advice is to have follow up cat scans to see if there is any growth. After my Mom had gone through several difficult testing proceedures which were detrimental to her overall health, we were told the evidence was inconclusive and a specimen would need to be obtained. After her surgery, we found an x-ray over 10 years old which showed the same spot on her lungs-and it had remained the same size. Her's was located in her upper left lobe, and after a partial wedge resection, pathology showed that the suspected tumor was not actually inside her lung, but behind it. My father also has a spot on his lung which has been watched with periodic x-rays and cat scans. He had tuberculosis 45 years ago, with a partial resection at that time. They suspect this is scarring as it has not grown. My mother however, received broken ribs from the rib-spreader and went into congestive heart failure after her surgery, and is no longer with us.