The Psoriasis Area Severity Index (PASI) is a tool used to measure the severity of psoriasis, a chronic autoimmune skin condition characterized by red, scaly patches on the skin. PASI takes into account the extent of psoriatic involvement (area) as well as the severity of erythema (redness), induration (thickness), and desquamation (scaling) present within the involved regions. It provides a quantitative assessment of psoriasis severity and is commonly used in clinical trials and practice to monitor disease progression and treatment efficacy.
psoriasis
Diagnostic Criteria for Psoriatic Arthritis (PsA)
Psoriatic arthritis is a type of arthritis that develops in some people with the skin condition psoriasis. It typically causes affected joints to become inflamed (swollen), stiff and painful.