Nevogenesis

The “Abtropfung” theory that nevi develop through the migration of nevus cells from the epidermis to the dermis prevailed for almost a century until the “Hochsteigerung” theory postulated the reverse pattern of migration. Most recently, however, new insights gained from epidemiology, cross-sectional and longitudinal studies of nevi, dermoscopy and confocal microscopy, and cellular and molecular st...