<prompt> Malignant melanoma most often develops fromDysplastic naevusJunctional naevusIntradermal naevusBlue naevus  <response>: 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 