case_images: PMC6488771_01
case_images: Partial view of frontal-temporal scalp demonstrating mixed morphology of
  lesions.
case_images: 10.1177_2050313X19847063-fig1.jpg
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case_images: fig1-2050313X19847063
case_images: Surface texture ranged from peau d'orange and mammilated to smooth and nodular (see Figures 1 and 2).
case_images: Lateral view of scalp demonstrating heterogeneity of texture among
  lesions.
case_images: 10.1177_2050313X19847063-fig2.jpg
case_images: PMC6488771_01_10.1177_2050313X19847063-fig2.jpg
case_images: fig2-2050313X19847063
case_images: Surface texture ranged from peau d'orange and mammilated to smooth and nodular (see Figures 1 and 2).
case_images: Vertex of scalp, frankly blue-black plaques clearly visible and surrounded by
  slight erythematous-pink plaques.
case_images: 10.1177_2050313X19847063-fig3.jpg
case_images: PMC6488771_01_10.1177_2050313X19847063-fig3.jpg
case_images: fig3-2050313X19847063
case_images: Taken from specimen A. At scanning magnification, the biopsy labelled A
  displayed a band-like proliferation of deeply pigmented cells in the upper
  third of the dermis, reminiscent a pattern seen in cellular blue nevi.
case_images: 10.1177_2050313X19847063-fig4.jpg
case_images: PMC6488771_01_10.1177_2050313X19847063-fig4.jpg
case_images: fig4-2050313X19847063
case_images: Occasional small irregular junctional nests of melanocytes were evident (see Figures 4 and 5).
case_images: Taken from specimen A. At higher magnification, the cellular infiltrate is
  seen to be composed of lightly pigmented melanocytes in the background with
  scattered, admixed, deeply pigmented melanophages. Junctional nests of
  melanocytes are also evident, a feature not seen in blue nevi.
case_images: 10.1177_2050313X19847063-fig5.jpg
case_images: PMC6488771_01_10.1177_2050313X19847063-fig5.jpg
case_images: fig5-2050313X19847063
case_images: Occasional small irregular junctional nests of melanocytes were evident (see Figures 4 and 5).
case_images: From specimen B. At scanning magnification, the biopsy labelled B displays a
  dense, sheet-like cellular infiltrate in the upper third of the dermis and
  in peri-follicular zones.
case_images: 10.1177_2050313X19847063-fig6.jpg
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case_images: fig6-2050313X19847063
case_images: The histopathological findings in the second sample (specimen B) differed from those in the first biopsy (see Figures 6-8).
case_images: From specimen B. Under higher magnification, the dermal cellular infiltrate
  is seen to be composed of non-pigmented, atypical, epithelioid melanocytes
  with occasional mitotic figures.
case_images: 10.1177_2050313X19847063-fig7.jpg
case_images: PMC6488771_01_10.1177_2050313X19847063-fig7.jpg
case_images: fig7-2050313X19847063
case_images: The histopathological findings in the second sample (specimen B) differed from those in the first biopsy (see Figures 6-8).
case_images: From specimen B. An immunohistochemical stain for Ki67 shows prominent
  nuclear positivity in lesional cells, indicative of a high proliferative
  index.
case_images: 10.1177_2050313X19847063-fig8.jpg
case_images: PMC6488771_01_10.1177_2050313X19847063-fig8.jpg
case_images: fig8-2050313X19847063
case_images: The histopathological findings in the second sample (specimen B) differed from those in the first biopsy (see Figures 6-8).