This video gives a histopathological demonstration of a skin lesion known as a melanocytic lesion or simply as a mole. These are basal melanocytes that grow to become nevus and with time get the shape of a malignant lesion on skin appearing as papules over skin epidermis. This video gives an introduction to moles, melanocytes, melanoma, dysplasia and microscopic illustration of these pathologies respectively. TIMELINE: 0:04 Introduction 0:16 Mole, Nevus 1:40 Nest in the epidermis 1:50 Dysplasia 2:07 Melanocyte 3:18 Melanoma 4:33 Histopathological analysis 5:41 End