Yeah, docs want to do a chest X-ray, blood work, and a full body pet scan.
And repeat it every year for the next five years.
(My kid sister, the RN, has been diagnosed with stage 1 melanoma. They cut a big bite out of her leg, and even though they think they got it all, that doesn't seem to be the end of it. For one thing, it might not have been the original site, but a met itself.)