With maturation, they may become raised, dome shaped, and pedunculated. Eventually, they disappear with aging. Rarely undergo malignant transformation. Increased risk factors for melanoma include fair skin, increased sun exposure, positive family history, increased number of nevi, presence of giant nevus, some familial syndromes, and immunosuppression. Should observe for rapid increase in size irregularity of the border development of asymmetry variation of color within nevus development of satellite lesions changes in texture.
Most observed changes are due to irritation or natural maturation of the nevus.
If there is concern about changes or parental anxiety, nevus should be removed. Let's Be Practical. The Physiology of Pigmented Nevi. Nelson's Textbook of Pediatrics. Morelli and Weston Sun,Moles, and Melanoma .