Vid plaque- psoriasis leder infiltration av inflammatoriska celler inkluderande T- celler till ökade TNF nivåer i de psoriatiska lesionerna jämfört med nivåerna i icke angripen hud. ###>In plaque psoriasis, infiltration by inflammatory cells including T-cells leads to increased TNF levels in psoriatic lesions compared with levels in uninvolved skin.