I was diagnosed with malignant melanoma about a mth and a half ago, my dermatologist recommended that I see an oncologist to have some blood work and a chest x ray done. The oncologist has done the blood work and chest x ray, and thursday i am having a sentinel node biopsy done, the doc is also recommending a pet scan be done. what are they looking for, did some of my labs come back abnormal, or are the docs being safe? I have read several articles about snb and pet scan, just wanted to see if i could get some more info.....thanks