Errichetti E, et al. - Experts evaluated the associations between clinical/dermoscopic findings of psoriatic plaques and therapeutic response to narrowband ultraviolet B (NB-UVB) phototherapy for finding positive and/or negative response predictor factors to such a treatment. A negative impact on the therapeutic response of psoriasis vulgaris to NB-UVB treatment was seen to be caused by local clinical factors (significant scaling/infiltration and legs localization). In highlighting possible response predictors, with globular and dotted vessels associated with bad and good outcomes, respectively, dermoscopy could be useful.