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October 2009

Multiple Blue Macules and Papules on the Scalp—Diagnosis

Author Affiliations

Copyright 2009 American Medical Association. All Rights Reserved. Applicable FARS/DFARS Restrictions Apply to Government Use.2009

Arch Dermatol. 2009;145(10):1183-1188. doi:10.1001/archdermatol.2009.215-b

A shave biopsy specimen of the largest central papule revealed a fibrotic dermis containing many heavily pigmented oval, spindle-shaped, and dendritic melanocytes and melanophages (Figure 2). Pale cells, mitotic figures, cytologic atypia, and nuclear pleomorphism were not observed (Figure 3). Similar findings were observed in a punch biopsy specimen from an adjacent satellite macule (not shown).