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Case 494 - Discussion

Uploaded: 2011-05-20, Updated: 2011-05-20

 

Cellular Blue Nevus

  • Location: buttocks, scalp, or sacrococcygeal region

  • HE:

    • Biphenotypic proliferation

    • Dumbbell-shaped, bulky heavily pigmented cellular lesion

    • Pigmented dendritic melanocytes in sclerotic stroma

    • Mitotic figures absent to rare

  • IHC: S100+, HMB45+