<unk>  is an uncommon, idiopathic, acquired dermatosis, characterized by evolving groups of erythematous, scaly papules that may persist for months.
Pityriasis lichenoides chronica
Pityriasis amiantacea
Dermatitis herpetiformis
Eczema vaccinatum
Sycosis vulgaris
Pityriasis rosea
Lichen simplex chronicus
Alopecia mucinosa