familial dysplastic nevus

Definition of familial dysplastic nevi
National Cancer Institute

familial dysplastic nevi

(fuh-MIH-lee-ul dis-PLAS-tik NEE-vye)
A condition that runs in certain families in which at least two members have dysplastic nevi (atypical moles) and have a tendency to develop melanoma.

Source: NCI Dictionary of Cancer Terms