<unk>  is an epithelial reaction pattern that is characterized by the accumulation of mucinous material in the epithelial hair follicle sheath and the sebaceous glands.  This generally presents, but not exclusively, as erythematous plaques or flat patches without hair primarily on the scalp and face.  This can also present on the body as a follicular<unk> s and may represent a systemic disease.
Alopecia mucinosa
Urticaria pigmentosa
Ichthyosis vulgaris
Ichthyosis bullosa of Siemens
Tinea barbae
Phytophotodermatitis
Tinea corporis
Sycosis vulgaris