POSTN and atopic eczema: As opposed to skin of atopic dermatitis we found periostin positivity in epidermal keratinocytes of lesional and even in non-lesional skin compared to healthy skin, at the same time, in the lesional psoriatic skin of untreated patients periostin distribution was decreased at the dermal–epidermal junction, which was confirmed by the mRNA expression and western blot analysis.