Epithelial mucinosis (follicular mucinosis) is a reactive histological pattern characterized by the accumulation of mucin in the infundibular, follicular, and sebaceous epithelium, that may occur in multiple skin conditions and cannot be considered a specific disease. Alopecia mucinosa is a clinicopathological entity with distinctive skin lesions, mucin deposits in the hair follicles and periadnexal lymphoid infiltrates. Three types of mucinous alopecia have been described: idiopathic, persistent or benign chronic, and associated to lymphoma. For some authors, these types of mucinous alopecia are not independent diseases, but rather represent variants of mycosis fungoides with epithelial mucinosis.
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J Eur Acad Dermatol Venereol
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