TY - CHAP M1 - Book, Section TI - Benign Melanocytic Lesions of the Nail A1 - Lipman, Zoe M. A1 - Tosti, Antonella A2 - Tosti, Antonella A2 - Piraccini, Bianca Maria Y1 - 2023 N1 - T2 - Disorders of the Hair and Nail: Diagnosis and Treatment AB - SUMMARYLongitudinal melanonychia (LM) is defined as a longitudinal band of brown-black pigment that runs from the nail matrix to the distal nail plate.It is important to distinguish benign etiologies of LM, like benign melanocytic activation, lentigos and nevi, from nail melanoma.A thorough history, physical exam, and onychoscopic inspection can provide helpful clues and guide management; however, excision and histopathological analysis remains the gold standard for diagnosis. SN - PB - McGraw Hill CY - New York, NY Y2 - 2024/09/20 UR - dermatology.mhmedical.com/content.aspx?aid=1201699127 ER -