Dilated Pore of Winer
David Cassarino, MD, PhD
Key Facts
Terminology
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Dilated pore of Winer (DPW)
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Enlarged follicular structure with acanthotic squamous lining and central keratin-filled space
Etiology/Pathogenesis
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May be related to preceding inflammatory cystic acne in some cases
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Solar damage also implicated as most cases occur in elderly
Clinical Issues
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Head and neck region most common
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Excellent, completely benign (likely nonneoplastic) lesion
Microscopic Pathology
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Enlarged, dilated follicular structure
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Infundibular-type keratinization with a granular layer
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Squamous epithelial lining shows acanthosis and finger-like projections into surrounding dermis
Dilated pore of Winer (DPW) at low-power examination shows a follicular structure with a dilated opening filled with keratin debris. This lesion shows focal rupture and associated inflammation  . |
Intermediate magnification of a DPW shows the acanthotic squamous lining epithelium with focal fingerlike projections  and mild basilar hyperpigmentation  . |
TERMINOLOGY
Abbreviations
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Dilated pore of Winer (DPW)
Definitions
-
Enlarged follicular structure with acanthotic squamous lining and central keratin-filled space
ETIOLOGY/PATHOGENESIS
Unknown
-
May be related to preceding inflammatory cystic acne in some cases
-
Solar damage also implicated as most cases occur in elderly
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