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Journal of the American Academy of Dermatology
Volume 7, n° 4
pages 461-467 (octobre 1982)
Doi : 10.1016/S0190-9622(82)70127-6
accepted : 2 February 1982
Eruptive vellus hair cysts—a facial variant
 

Masanobu Kumakiri, M.D. 1, Iwao Takashima, M.D., Misao Iju, M.D., Michiru Nogawa, M.D., Yusho Miura, M.D.
From the Department of Dermatology, Hokkaido University School of Medicine (Kumakiri, Nogawa, and Miura), and the Department of Dermatology, National Railroad Hospital of Sapporo (Takashima and Iju). 

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A 29-year-old man and a 29-year-old woman developed over fifty asymptomatic, slate-colored macules disseminated mainly on the forehead. Histologic study revealed keratinous cysts in the dermis, lined by a few layers of epithelial cells with rudimentary hair bulb-like structures. The cysts' contents were vellus hair fragments and laminated horny material. Ultrastructural studies of the second case disclosed that the keratinization of the cyst wall was similar to that of the infundibular portion of the outer root sheath. It is suggested that our two cases are a type of follicular hamartoma. Similar follicular hamartomas, eruptive vellus hair cysts have been reported previously. The cysts were located in the chest and/or extremities and had a tendency to be eliminated trans epidermally. Although these clinical features were different from ours, the characteristic histologic features were the same; therefore, our cases might be a variant of eruptive vellus hair cysts. (J AM ACAD DERMATOL 7:461-467, 1982.)

The full text of this article is available in PDF format.
1  Reprint requests to: Dr. Masanobu Kumakiri, Department of Dermatology, Hokkaido University School of Medicine, Kita 15-jyo, Nishi-7chome, Sapporo, 060, Japan.

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