Skin Melanoma. These are the layers of the skin showing placement of the arteries and veins. The epidermis is the superficial layer, the dermis is the lower layer. In this illustration, the melanoma tumor is depicted in brown, and can be seen on the surface as a mole. Medical Illustration Medical Illustration. Copyrighted Material Illustrated by Laura Maaske Medical Illustrator, Medical Animator, Biomedical Communicator, & biological artist. For permission information contact the artist