How is morphology of dysplastic nevus?

➢ Microscopically, dysplastic nevi are mostly compound nevi that exhibit both architectural and cytologic evidence of abnormal growth. ➢ Nevus cell nests within the epidermis may be enlarged and exhibit abnormal fusion or coalescence with adjacent nests (bridging). ➢ As part of this process, single nevus cells begin to replace the normal basal cell layer along the dermo epidermal junction, producing so-called “lentiginous hyperplasia”. ➢ Cytologic atypia consisting of irregular, often angulated, nuclear contours and hyperchromasia is frequently observed