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Comedonic nevus: causes, symptoms, diagnosis, treatment
Last reviewed: 23.04.2024
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Comedon nevus (syn: follicular keratotic nevus) can exist from birth or manifest in puberty or later life. Clinically, the comedon nevus is represented by multiple comedones grouped in the form of ribbon-like strands of different lengths or clusters of a different configuration, usually one-sided localization, but two-sided variants are also described. As a rule, the localization of the nevus is associated with the presence of hair follicles, although it rarely occurs on the scalp. Sharply widened follicular canals of round or oval shape, contain a horny substance that is difficult to remove. The course is usually asymptomatic, but with damage to the wall of the follicle is complicated by inflammation of varying severity.
Pathomorphology of the comedon nevus. Detect wide, elongated follicular canals, filled with masses of keratinocytes. The epithelial lining of the funnel is usually thinned. The sharply widened funnel can extend into the depth of the dermis up to the level of the subcutaneous adipose tissue. When the wall breaks, a typical inflammatory response to the foreign body is formed.
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