Hello, I would be happy to help you with your question.
First of all, melanoma
is a type of skin cancer
that "breaks the rules" as far as how and where it spreads. While there can be 'local' spread, there can also be spread to other locations that appear first. Considering how the lymphatic system
works, though, I would next expect a groin lymph node to be a typical distant site of spread.
There is minimal risk to sedating your for this excision, and that risk, based on what you are saying, is far less than the risk of aggressively treating the melanoma before it does spread. You need to pose these same questions to your doctor as well.
I hope that this helps and good luck!