RT Book, Section A1 Taylor, Susan C. A1 Elbuluk, Nada M. SR Print(0) ID 1200674437 T1 Melanonychia T2 Taylor and Elbuluk's Color Atlas and Synopsis for Skin of Color YR 2023 FD 2023 PB McGraw-Hill Education PP New York, NY SN 9781264268900 LK dermatology.mhmedical.com/content.aspx?aid=1200674437 RD 2024/03/29 AB KEY POINTSLongitudinal melanonychia (LM) is a benign presentation of vertical pigmented streaks on the nail plate that typically range in color from tan to dark brown.LM is more common in skin of color, and those with melanonychia should be evaluated to rule out acral melanoma.Its presence in multiple digits can help confirm the diagnosis of melanonychia and decreases the likelihood of melanoma.