Nodular melanoma mimicking keratoacanthoma: Lessons to learn

Leelavathi Muthupalaniappen*, Srijit Das, Norazirah Md Nor, Siti A.M. Ali

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

A 67-year-old man of Chinese descent presented with a painless nodular lesion that had been present on his right forearm for the previous 3 months. A single, well-defined, dome-shaped, firm nodule with a central keratin plug surrounded by erythema was noted. Keratoacanthoma with secondary bacterial infection was suspected and the patient underwent an excision biopsy. Biopsy of the nodule and immunohistochemical staining supported a diagnosis of nodular malignant melanoma. It should be noted both that nodular malignant melanoma may present with a wide variety of clinical appearances, and that the lack of melanin pigment in nodular malignant melanoma may hinder the diagnosis of this aggressive tumour.

Original languageEnglish
Pages (from-to)360-363
Number of pages4
JournalSultan Qaboos University Medical Journal
Volume12
Issue number3
DOIs
Publication statusPublished - 2012
Externally publishedYes

Keywords

  • Case report
  • Keratoacanthoma
  • Malaysia
  • Malignant melanoma
  • Melanoma

ASJC Scopus subject areas

  • Medicine(all)

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