Nevogenesis: Changing Theories.- Classifying Melanocytic Nevi.- Evolution of Nevi.- The Dual Pathway of Nevogenesis.- Confocal Microscopy: Improving Our Understanding of Nevogenesis.- Nevi In Children And Adults: Dermoscopic Patterns And The Development of New Nevi .- Etiology of Congenital Melanocytic Nevi And Related Conditions.- Molecular Nevogenesis.- Nevogenesis: A Benign Metastatic Process?.- Nevus Senescence.- Gene-Environment Interactions In Nevogenesis.- Malignant Transformation of Melanocytic Nevi.- Disappearance of Melanocytic Nevi.