Case 50, dysplastic nevus. Less than perfect imaging contributed to confusion in the case. In this field, numerous epithelial melanocytes caused concern for one pathologists that that was magnified because foci were slightly out of focus (i.e. upper left corner).
Gilbertson et al. BMC Clinical Pathology 2006 6:4 doi:10.1186/1472-6890-6-4