Dilated pore D23.L
Synonym(s)
giant pore
History
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Winer, 1954
Definition
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Benign neoplasia of the outer hair root sheath (infundibular horny cyst). S.a. Adnexal tumours with hair follicle differentiation.
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Etiopathogenesis
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Controversial entity; minus variant of a naevus comedonicus? Misinterpreted "banal" giant comedo.
Manifestation
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6th to 7th decade of life.
Localization
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Especially face, neck, shoulder girdle.
Clinic
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Wide pore with comedone clot-like content, especially in actinically damaged skin, but also in places which are intensively anchored to their underlay due to topographical peculiarities (e.g. skin over the spine, neck).
Histology
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Exit from a sebaceous gland follicle, papillomatous wall structure, melanin pigmentation, retarded horny cell masses, which can reach into the subcutis. The surrounding connective tissue shows actinic elastosis, depending on its localization.
Differential diagnosis
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Therapy
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In case of cosmetic disorder excision.
Literature
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- Morikawa T et al (2003) Dilated pore: a case report and an immunohistochemical study of cytokeratin expression. J Dermatol 30: 556-558
- Resnik KS et al (1993) Dilated pore nevus. A histologic variant of nevus comedonicus. At J Dermatopathol 15: 169-171
- Steffen C (2001) Winer's dilated pore: the infundibuloma. At J Dermatopathol 23: 246-253
- Winer L (1954) The dilated pore, a trichoepithelioma. J Invest Dermatol 23: 181
Recommended articles
Outgoing links (5)
Adnexal tumors with hair follicle differentiation; Excision; Giant comedo; Komedo; Scar;Disclaimer
Please ask your physician for a reliable diagnosis. This website is only meant as a reference.
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Prof. Dr. med. Peter Altmeyer
