Follicular mucinosis is a rare dermatosis characterized by accumulation of mucin in the follicular epithelium and sebaceous glands. Clinically, it is characterized by the presence of papules or well-circumscribed and infiltrative plaques. In this paper, we report a case of a 15-year-old girl, in which an asymptomatic, erythematous and infiltrative plaque evolved within a few weeks in the forehead region. There was no regression of the lesion with the use of topical glucocorticosteroids and isotretinoinum for 30 days.
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