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AMIR H. MEHREGAN, MD

Arch Dermatol. 1964;89(2):229-235.

Abstract
Helwig's inverted follicular keratosis is a benign epithelial tumor appearing most commonly as a single lesion on the face of patients in the older age group. It is characterized by distinct histologic features. After careful study of 40 cases, I am inclined to agree with Duperrat and Mascaro that these tumors are closely related to the infundibulum of the hair follicle and are an analogue of eccrine poroma which is generally accepted as a tumor of the intraepidermal sweat duct unit. Histologic points supporting this idea are presented, and a comparison with eccrine poroma is made.

Author Affiliations
DETROIT

From the Departments of Dermatology, Wayne State University College of Medicine and Detroit Receiving Hospital.

Footnotes
Supported in part by research grant AM-07194 from the US Public Health Service through the National Institute of Arthritis and Metabolic Diseases.

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