Blue nevi (BN) and neurocristic hamartomas (NCH) are pigmented lesions that 
originate from the aberrant development of cells derived from the neural crest. 
BN are composed of dermal melanocytes, whereas NCH have a broader histology and 
show Schwann cell differentiation as well. In addition, BN and NCH might differ 
in their potential to develop into a malignancy. We describe a patient with a 
lesion showing features of both a plaque-type BN and NCH.