Dermoscopic Features of Twin Melanomas of the Lower Leg: A Case Report

Acta Dermatovenerol Croat. 2020 Aug;28(2):113-115.

Abstract

Multiple primary malignancies, including melanoma, usually present singly over time rather than simultaneously. Hovewer, approximatelly one third of the patients develop multiple primary melanomas. We present a case of a 57-year-old woman, with two grossly suspicious, unevenly pigmented lesions on her left lower leg measuring up to 8 and 11 mm. Dermoscopy of both lesions showed similar findings with complete asimmetry of colour and structure. More than four colours including milky red and accumulation of pigment at 1 o'clock were observed in the smaller lesion. Dermoscopy of the largest lesion showed more than 3 colours, milky-red areas, and a slight blue-white veil. Histopathology of both lesions revealed melanoma. Although uncommon, multiple primary melanomas do appear. Careful dermoscopical evaluation of all lesions is mandatory in order to not miss such cases.

Publication types

  • Case Reports

MeSH terms

  • Dermoscopy*
  • Diagnosis, Differential
  • Female
  • Humans
  • Leg*
  • Melanoma / diagnosis*
  • Melanoma / pathology
  • Middle Aged
  • Skin Neoplasms / diagnosis*
  • Skin Neoplasms / pathology