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Limitations and challenges of nail unit dermoscopy in longitudinal melanonychia

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Cited by (15)

  • Approaches to Tumors of the Nail Unit and Genitalia

    2023, Dermatologic Clinics
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    Delays in diagnosis are due to the asymptomatic nature of the lesions and common presentation with other benign causes, such as onychomycosis and trauma. There are challenges with histologic diagnosis as well, given features overlap with other benign melanocytic lesions.10,21,23,24 The ABCDE rule for melanoma of the nail unit is useful in evaluating melanonychia, as well as Hutchinson sign, in which pigment extends on the proximal nail matrix or nail folds.1

  • Pigmented Nail Lesions: When to Observe, When to Biopsy, When to Widely Excise, and When to Amputate?

    2022, Journal of Hand Surgery
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    Serial review is important to ensure progressive movement of the hematoma distally as it may mask the appearance of a SUM with hemorrhage. Several investigators did not find important differences in the ABCDEF criteria and dermoscopic findings between patients with biopsy-proven benign LM and SUM.17,20,21 In addition, dermoscopy is not useful when the nail is very thick or completely blackened by melanin.19

  • Clinical and dermoscopic findings of benign longitudinal melanonychia due to melanocytic activation differ by skin type and predict likelihood of nail matrix biopsy

    2022, Journal of the American Academy of Dermatology
    Citation Excerpt :

    Therefore, a reevaluation of dermoscopic features of LM in SoC patients is necessary. Although dermoscopy is a useful tool in evaluating LM, the decision to perform a nail matrix biopsy should also be based on a history and physical examination findings.20,21 In our study, patients who underwent nail biopsy, on average, had darker bands, had higher mean band width percentage, and more often reported evolving bands than patients for whom biopsy was not recommended.

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Conflicts of interest: None declared.

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