Specific features of psoriasis vulgaris under the ultraviolet dermoscopy

• Ultraviolet-dermoscopy is a rapid non-invasive and convenient tool for psoriasis diagnosis. • Red fluorescence which is only observed in psoriatic plaques under ultraviolet-dermoscopy could help differential diagnosis of erythrosquamous dermatoses • Glomerular vessels, Auspitz sign and red fluorescence, simultaneously observed via ultraviolet-dermoscopy, indicated the severity of psoriasis.