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A 57-year-old male presented with a 5-year history of a red longitudinal band and splinter hemorrhages involving the left thumbnail. Physical examination showed longitudinal erythronychia and a distal subungual hyperkeratotic papule. Excision with histopathology showed focal hyperplasia, elongated rete ridges, onycholemmal keratinization, and vascular ectasia, consistent with an onychopapilloma. Longitudinal erythronychia has a broad differential, including benign and malignant conditions. In equivocal cases, diagnosis requires excision with histopathology.

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A Case of Onychopapilloma Presenting as Longitudinal Erythronychia

  • 章节

  • 发表日期：

    2025年

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  • Eden Axler,
  • Shari R. Lipner

摘要

A 57-year-old male presented with a 5-year history of a red longitudinal band and splinter hemorrhages involving the left thumbnail. Physical examination showed longitudinal erythronychia and a distal subungual hyperkeratotic papule. Excision with histopathology showed focal hyperplasia, elongated rete ridges, onycholemmal keratinization, and vascular ectasia, consistent with an onychopapilloma. Longitudinal erythronychia has a broad differential, including benign and malignant conditions. In equivocal cases, diagnosis requires excision with histopathology.