Dilated Pore of Winer

Updated: Apr 03, 2018
  • Author: Alyssa Y Kim, MD; Chief Editor: Dirk M Elston, MD  more...
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Overview

Background

A dilated pore of Winer is a hair structure anomaly that appears as an enlarged solitary comedo. [1] Most commonly, it appears on the face of a middle-aged person. This condition is not associated with acne vulgaris. See the images below.

Dilated pore of Winer on forehead. Dilated pore of Winer on forehead.
Dilated pores of Winer on forehead and lateral upp Dilated pores of Winer on forehead and lateral upper labial region.
Dilated pore of Winer on lateral upper labial regi Dilated pore of Winer on lateral upper labial region.
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Pathophysiology

A dilated pore of Winer is a tumor of the intraepidermal follicle and infundibulum of a pilosebaceous apparatus. [2] An immunohistochemical study using monoclonal antibodies against cytokeratins and involucrin confirmed differentiation toward the infundibulum and partly toward the isthmus. [3]

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Etiology

The cause of a dilated pore of Winer is unknown. Winer suggested that an infection or an obstruction of the follicle ostium is the stimulus for the development of a dilated pore of Winer in a process similar to those of inflammatory cystic acne or other cystic conditions.

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Epidemiology

Frequency

Most cases of dilated pore of Winer are reported in older adults in both the American and European literature.

Race

Most cases of dilated pore of Winer have been reported in white males.

Sex

Although dilated pores are found in both sexes, they appear to occur in men more often than in women.

Age

Most cases of dilated pore of Winer are diagnosed in individuals older than 40 years; however, many individuals report that they have had the lesions for many decades, usually starting when they are aged 20-60 years.

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Prognosis

Incomplete excision results in regeneration of the dilated pore from the residual infundibular lining. Prognosis is excellent with no known report of death. One case of trichoid basal cell carcinoma in a dilated pore has been reported. [4] More commonly, chronic manipulation and expression of the keratotic plug from inside the pore may lead to inflammation and infection of the surrounding tissue.

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