melanotic macule nail Dark Spots on Nails – What Is Melanonychia Polydactylous longitudinal melanonychia is usually

Polydactylous longitudinal melanonychia is usually benign and can originate from local or systemic causes, including medication intake; monodactylous longitudinal melanonychia may be a sign of melanoma. Authors review the current literature to Melanonychia Longitudinal Melanonychia MDedge Clinicohistopathologic challenges and traps in the diagnosis of nail unit melanoma Jiang 2023 Journal of Cutaneous Pathology Wiley Online Library Melanonychia: when should we worry? This dark stripe in the nail is called melanonychia essentially pigment in the nail bed. You can think of it like a mole of the nail. Use of Nail Dermoscopy in the Management of Melanonychia: Review PMC

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