severe dysplastic nevus melanomadysplastic nevus removal surgerylentiginous dysplastic nevusdysplastic nevus pathologysevere dysplastic nevusmoderate dysplastic nevusexcision of dysplastic nevusclarks dysplastic nevusdysplastic nevus moleseverely dysplastic compound nevusdysplastic nevus with severe atypiamildly dysplastic compound nevus