▁clin ician ▁will ▁require ▁further ▁surg ery ▁if ▁moder ate ▁to ▁severe ▁c yt olog ic ▁at yp ia ▁is ▁present ▁– ▁and ▁if ▁resid ual ▁nev us ▁is ▁present ▁at ▁the ▁surg ical ▁margin . ▁ ▁D ys pl astic ▁nev us ▁synd rome ▁ ▁" D ys pl astic ▁nev us ▁synd rome " ▁refers ▁to ▁individuals ▁who ▁have ▁high ▁numbers ▁of ▁ben ign ▁mol es ▁and ▁also ▁have ▁d ys pl astic ▁ne vi . ▁A ▁small ▁percent ▁of ▁these ▁individuals ▁are ▁members ▁of ▁mel an oma ▁kind red s . ▁In her ited ▁d ys pl astic ▁nev us ▁synd rome ▁is ▁an ▁aut os om al ▁dominant ▁her edit ary ▁condition . ▁D ys pl astic ▁ne vi ▁are ▁more ▁likely ▁to ▁under go ▁m align ant ▁transformation ▁when ▁they ▁occur ▁among ▁members ▁of ▁mel an oma ▁families . ▁At ▁least ▁one ▁study ▁indicates ▁a ▁cum ulative ▁lifetime ▁risk ▁of ▁nearly ▁ 1 0 0 % ▁in ▁individuals ▁who ▁have ▁d ys pl astic ▁ne vi ▁and ▁are ▁members ▁of ▁mel an oma ▁kind red s . ▁R ough ly ▁ 7 0 % ▁of ▁mel an omas ▁arise ▁" de ▁nov o " ▁on ▁clear ▁skin ▁growth , ▁whereas ▁the ▁rest ▁arise ▁within ▁at yp ical ▁mol es . ▁Those ▁with ▁d ys pl astic ▁ne vi ▁have ▁an ▁elev ated ▁risk ▁of ▁mel an oma . ▁Such ▁persons ▁need ▁to ▁be ▁checked ▁regularly ▁for ▁any ▁changes ▁in ▁their ▁mol es ▁and ▁to ▁note ▁any ▁new ▁ones