RT Book, Section A1 Hunt, Raegan A1 Schaffer, Julie V. A2 Kline, Mark W. SR Print(0) ID 1182905399 T1 Melanocytic Lesions and Disorders of Pigmentation T2 Rudolph's Pediatrics, 23e YR 2018 FD 2018 PB McGraw-Hill Education PP New York, NY SN 9781259588594 LK accesspediatrics.mhmedical.com/content.aspx?aid=1182905399 RD 2024/03/29 AB Melanocytic lesions are extremely common in pediatric patients. At least 1 melanocytic nevus develops by early childhood in more than 95% of fair-skinned individuals. Dermal melanocytosis and other pigmented lesions such as freckles, lentigines, café-au-lait macules, and Becker nevi are also frequently observed in children and adolescents. In addition, a variety of disorders characterized by increased or decreased cutaneous pigmentation can present in childhood, ranging from postinflammatory hyperpigmentation and hypopigmentation to vitiligo to patterned pigmentation reflecting cutaneous mosaicism. Genetic diseases with pigmentary manifestations (eg, oculocutaneous albinism, piebaldism, Waardenburg syndrome, tuberous sclerosis, neurofibromatosis) are reviewed in Chapter 355. It is important for pediatricians to be aware of the clinical spectrum and natural history of benign melanocytic lesions and self-limited disorders of pigmentation in children as well as of findings that should raise concern.