Our expert says:
This article explains it nicely: http://skincancer.about.com/od/diagnosis/a/clark_breslow.htm
Breslow is the thickness of the whole melanoma, Clark is the level of penetration into the skin. A level 2 would be just under the dermis or upper layer of the skin. If the tumour can be removed with clean margins, the chances of 100% recovery is very good. You will need to go for regular check ups though.
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