RT Book, Section A1 Yashar, Sharona A1 Haley, Jennifer A1 Robinson-Bostom, Leslie A1 Reid, Nianda A2 Kelly, A. Paul A2 Taylor, Susan C. A2 Lim, Henry W. A2 Serrano, Ana Maria Anido SR Print(0) ID 1161545149 T1 Normal and Pathological Skin Lesions T2 Taylor and Kelly's Dermatology for Skin of Color, 2e YR 2016 FD 2016 PB McGraw-Hill Education PP New York, NY SN 9780071805520 LK accessmedicine.mhmedical.com/content.aspx?aid=1161545149 RD 2024/04/24 AB KEY POINTSPigmentary demarcation lines are normal boundaries of the skin that represent a transition between levels of melanin pigment in the skin corresponding to dermatomal innervation.Longitudinal melanonychia is a normal pattern of nail pigmentation seen in patients with skin of color. It is important to differentiate normal nail pigmentation from malignant melanocytic proliferations and extraneous pigment deposition.Physiologic pigmentation of the oral mucosa is commonly seen in patients with skin of color.Erythema dyschromicum perstans is seen more often in people with skin of color.Lability of pigment in the darker-skinned population causes dramatic changes in skin color after inflammatory processes of the skin.Many common dermatologic conditions manifest with follicular or papular lesions in dark-skinned individuals.Keloidal scarring is common in patients with skin of color.