JAMES M.GRICHNIKMD, PhD
The lesions shown are from the cheek of an 18-year-old white man (Figure 1), and the cheek of an 8-year-oldwhite child (Figure 2) (size bar,5 mm). Both the lesions reveal a relatively similar pattern. Coloration is clearly two-tone with a brown overlying component and an underlying blue component.In the lesions shown, the brown and bluecomponents appear to have similar dimensions. Theoretically, combined blue nevi may result from a clone of cellsthat migrate and differentiate along 2 different pathways. Another possibility could include a field effect resulting in a secondary melanocytic proliferationin response to factors secreted from the primary population.
Not Available. Dermoscopy of Melanocytic NeoplasmsCombined Blue Nevi. Arch Dermatol. 2004;140(7):902. doi:10.1001/archderm.140.7.902