▁l ent igo ▁sen ilis , ▁and ▁even ▁w arts ▁may ▁have ▁ABC D ▁characteristics , ▁and ▁cannot ▁be ▁distinguished ▁from ▁a ▁mel an oma ▁without ▁a ▁trained ▁eye ▁or ▁der mat os copy . ▁ ▁A ▁recent ▁and ▁novel ▁method ▁of ▁mel an oma ▁detection ▁is ▁the ▁" U gly ▁D uck ling ▁Sign ". ▁It ▁is ▁simple , ▁easy ▁to ▁teach , ▁and ▁highly ▁effective ▁in ▁detect ing ▁mel an oma . ▁Sim ply , ▁correlation ▁of ▁common ▁characteristics ▁of ▁a ▁person ' s ▁skin ▁les ion ▁is ▁made . ▁Les ions ▁which ▁greatly ▁devi ate ▁from ▁the ▁common ▁characteristics ▁are ▁l abeled ▁as ▁an ▁" U gly ▁D uck ling ", ▁and ▁a ▁der mat ologist ▁exam ▁is ▁required . ▁The ▁" L ittle ▁Red ▁R iding ▁H ood " ▁sign ▁suggests ▁that ▁individuals ▁with ▁fair ▁skin ▁and ▁light ▁colored ▁hair ▁might ▁prove ▁more ▁challeng ing . ▁These ▁fair - sk inned ▁individuals ▁often ▁have ▁light ly ▁p ig ment ed ▁or ▁am el an otic ▁mel an omas ▁which ▁will ▁not ▁present ▁with ▁easy ▁to ▁observe ▁color ▁changes ▁and ▁variation ▁in ▁colors . ▁The ▁borders ▁of ▁these ▁am el an otic ▁mel an omas ▁are ▁often ▁ind ist inct , ▁making ▁visual ▁identification ▁without ▁a ▁der mat os cope ▁( der mat os copy ) ▁very ▁difficult . ▁A ▁der mat os cope ▁must ▁be ▁used ▁to ▁detect ▁" ug ly ▁du ck lings " ▁among ▁those ▁with ▁light ▁skin ▁or ▁bl onde / red ▁hair . ▁ ▁People