S100A7 and psoriasis: hS100A7 (psoriasin) belongs to the S100A family of Ca2+-binding proteins, it has been reported with many functions, such as antimicrobial,[11] chemotactic activity,[12, 13] and associated with some diseases, such as psoriasis,[14] skin tumors,[15, 16] atopic dermatitis,[17] and chronic rhinosinusitis.[18] These conditions are characterized by an inflammatory reaction, suggesting the role of hS100A7 in the regulation of inflammation.