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Pathology of Dilated Pore

of Winer

Dr Sampurna Roy MD               




Dilated pore of Winer is relatively common but poorly recognized adnexal lesion. The Winer dilated pore.Med Cutan Ibero Lat Am. 1989;17 (1):45-7.

The lesion is commonly noted in elderly patients.

Clinically the lesion looks like a giant comedo.

These are usually located in the head, neck and upper trunk.

Microscopic features:

- Lesion may extend to mid or lower dermis ;

- Funnel shaped structure lined by infundibular or isthmic-type epithelium,

- It is filled with laminated keratin, connected to the surface ; 

- Thickening of epithelium including finger-like projection into the dermis ;

- Epidermoid keratinization.


Differential diagnosis: Pilar sheath acanthoma

Further reading:

Dermoscopy of a dilated pore of Winer.

Hair cortex comedo: a series of 34 cases.

Winer's dilated pore of the eyelid.

Dilated pore: a case report and an immunohistochemical study of cytokeratin expression.

Dilated pore of Winer.

Trichoid basal cell carcinoma found in a dilated pore on the nose.

[The Winer dilated pore].





Dr Sampurna Roy  MD

Consultant  Histopathologist (Kolkata - India)






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