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Congenital Arrector Pili HamartomaA Case Report and Review of the Spectrum of Becker's Melanosis and Pilar Smooth-Muscle Hamartoma
Nancy R. Slifman, MD;
Terence J. Harrist, MD;
Arthur R. Rhodes, MD
Arch Dermatol. 1985;121(8):1034-1037.
Abstract
• Congenital pigmented arrector pili hamartomas are unique malformations of epidermis and pilar apparatus usually appearing as localized, lightly pigmented, hairy plaques. Characteristic microscopic features include smooth-muscle proliferation similar to irregularly disposed arrectores pilorum, and slight elongation of epidermal rete with hypermelanosis of the basal unit. An otherwise normally developed child who had this hamartoma at birth is described in an attempt to clarify the relationship between pilar smooth-muscle hamartomas and Becker's melanosis. We propose that these two entities belong at different poles of the same developmental spectrum of hamartomatous change.
(Arch Dermatol 1985;121:1034-1037)
Author Affiliations
From the Division of Dermatology, The Children's Hospital (Drs Slifman and Rhodes), the Department of Pathology, Massachusetts General Hospital (Dr Harrist), and the Departments of Dermatology (Drs Slifman and Rhodes) and Pathology (Dr Harrist), Harvard Medical School, Boston.
Footnotes
Accepted for publication Oct 31, 1984.
Reprint requests to Division of Dermatology, The Children's Hospital, 300 Longwood Ave, Boston, MA 02115 (Dr Rhodes).
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