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October 1978

Pilar Sheath Acanthoma

Author Affiliations

From the Departments of Dermatology and Pathology, Wayne State University School of Medicine, Detroit, and Pinkus Dermatopathology Laboratory, Monroe, Mich (Dr Mehregan), and the Departments of Dermatology and Pathology, New York Medical College-Metropolitan Hospital Center, and Laboratory of Dermatopathology, Great Neck, NY (Dr Brownstein).

Arch Dermatol. 1978;114(10):1495-1497. doi:10.1001/archderm.1978.01640220044011

• A newly recognized, benign follicular tumor occurred in nine patients who ranged in age from 46 to 75 (median, 55) years. The neoplasms were solitary, asymptomatic, skin-colored nodules with a central pore-like opening plugged with keratin. All lesions had been present for years. Eight were on the skin of the upper lip and one was on the forehead. Histologically, a central cystic cavity showing epidermoid keratinization extended from the surface into the deep cutis. Multiple tumor lobules that were composed of hair sheath epithelium extended from the cyst wall into the surrounding corium. This neoplasm, which we have named "pilar sheath acanthoma," must be differentiated from trichofolliculoma and dilated pore.

(Arch Dermatol 114:1495-1497, 1978)