CASPAR is the acronym for "Classification criteria for Psoriatic Arthritis". CASPAR criteria are considered an important tool for the diagnosis of psoriatic arthritis (PsA). The CASPAR criteria were introduced in 2006 and are used in clinical research and clinical practice to differentiate patients with psoriatic arthritis from other arthritides. The main purpose of the CASPAR criteria is to provide a consistent and reliable diagnosis to improve the treatment and management of the disease. For further units see below. CASPAR criteria/Dermatology