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Dilated Pore of Winer
Dilated pore of Winer presents as a single dilated comedo, primarily occurring on the face of adults.
Pathology
A dilated follicular opening, filled with keratinous debris and lined by squamous epithelium with a granular layer, is seen. The lining is acanthotic with finger-like projections pushing into the surrounding dermis.
Differential diagnosis
Although there is usually a more papular component, an obvious pore can be seen in a pilar sheath acanthoma, trichoepithelioma, and largepore BCC.
Treatment
If treatment is desired, excision is curative.
Fig. 110.3 Primary cysts of follicular origin. Anatomic origin of cysts derived from the pilosebaceous unit. Adapted from Requena L, Sanchez Yus E. Follicular hybrid cysts. An expanded spectrum. Am J Dermatopathol 1991;13:228โ33.
Fig. 110.4 Multiple epidermoid cysts of the scrotum.Courtesy Lorenzo Cerroni, MD.
Fig. 110.5 Inflamed epidermoid cyst. Such painful inflammatory reactions to cyst rupture are a frequent cause for presentation to a physician.
Fig. 110.6 Histopathology of an epidermoid cyst. Laminated keratin within an epithelial-lined cyst in the dermis. The cyst wall shows infundibular keratinization including a granular layer (inset).