RT Book, Section A1 Schaffer, Julie V. A1 Orlow, Seth J. A2 Rudolph, Colin D. A2 Rudolph, Abraham M. A2 Lister, George E. A2 First, Lewis R. A2 Gershon, Anne A. SR Print(0) ID 7032959 T1 Chapter 361. Melanocytic Lesions and Disorders of Pigmentation T2 Rudolph's Pediatrics, 22e YR 2011 FD 2011 PB The McGraw-Hill Companies PP New York, NY SN 978-0-07-149723-7 LK accesspediatrics.mhmedical.com/content.aspx?aid=7032959 RD 2024/10/04 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.1 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 360. 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.