My boyfriend had a growth removed from his lung a few weeks ago and the test results showed it wasn't lung cancer but melanoma. Today he went for a skin check and nothing has been found. Does this mean the cancer that was removed from his lung is a secondary cancer? If so what does this mean? I am so worried as he got on the Internet and now after reading about melanoma he thinks he has stage 4 melanoma. Could this be the case or is he just thinking the worst? We are waiting for the hospital to let us know when his appointment is for the melanoma clinic. Should we be worried or not yet? So worried and need answers.