Psoriasin expression relative to mitosis and inflammation within lesion type. Panel A: Psoriasin expression levels determined by IHC score relative to mitotic count in squamous epithelial pathologies (actinic keratosis, squamous carcinoma in-situ and squamous invasive lesions). Panel B: Psoriasin expression levels determined by IHC score relative to inflammation within each lesion type. Distribution of expression within cases without inflammation (-) and with inflammation (+) for actinic keratosis (AK-, AK+), squamous carcinoma in-situ (IS-, IS+), and invasive squamous cell carcinoma (INV-, INV+). Bars represent medians. P values determined by Mann Whitney test.