For 10 points, name this condition characterized by erythematous plaques with silvery scales, a chronic inflammatory disease of the skin.
Autoimmune etiology for this disease is based on an association with HLA Cw6.  Calcipotriol and dithranol are largely outdated treatment modalities unlike Ingram's regimen which can cure up to 80% of cases.  Among the pathological types of this disease are guttate and pustular, and there can be an associated arthropathy explaining the use of TNF-alpha blockers in combating it.  However, the first line therapy is the use of PUVA or psoralens with ultraviolet A. Its typical manifestations can be seen on flexor surfaces, palms, with nail involvement, and the scalp where it is sometimes confused with seborrhoeic dermatitis.  For 10 points, name this condition characterized by erythematous plaques with silvery scales, a chronic inflammatory disease of the skin.
Autoimmune etiology for this disease is based on an association with HLA Cw6.  
psoriasis