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Ostiophalliculitis and folliculitis
Last reviewed: 17.10.2021
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Ostiophalliculitis or staphylococcal impetigo (syn: Impitch of Bokhard) - acute inflammation of the mouth of the hair follicle caused by staphylococcus. On the skin of the hairy areas, more often the face and head, there are single or multiple, located in the mouths of the hair follicles, often in the center of hairless, conical or hemispherical pustules the size of a pinhead, filled with thick pus, surrounded by a small corolla of hyperemia. After a few days, the content of the pustule dries to form a brownish crust.
Pathomorphology of ostiophalliculitis or staphylococcal impetigo
The pustule is located under the stratum corneum of the epidermis, surrounding the opening of the hair follicle. Over time, purulent melting of this area of the follicle occurs. In the dermis, an inflammatory infiltrate is identified, localized around the upper part of the epithelial hair follicles. The infiltrate consists mainly of a large number of neutrophilic granulocytes.
Folliculitis is a purulent inflammation of the hair follicle, caused more often by golden staphylococcus. Usually develops from ostiophalliculitis, clinically represents a small cone shaped pustule, in the center is permeated with gun hair. After opening the folliculitis and excretion of pus there is a small sore that is covered by a purulent-bloody crust, which later falls off with the formation of a pigmented spot or a scar. Elements can be single or multiple.
Pathomorphology
In the hair follicle, a cluster of pus is found, and in the perifollicular tissue there is an infiltrate consisting of leukocytes and lymphocytes.