Malignant melanoma most often develops from
Dysplastic naevus
Junctional naevus
Intradermal naevus
Blue naevus
Dysplastic naevus is an irregular proliferation of atypical melanocytes at the basal layer of epidermis Dysplastic naevus has a familial inheritance and carries a 5-10 per cent risk of forming a superficial spreading melanoma. Bailey and Love 26th edition Pg : 591
General surgery