M09: Juvenile arthritis in diseases classified elsewhere

M09.0: Juvenile arthritis in psoriasis

Juvenile arthritis in psoriasis, denoted by the code M09.0 in the ICD-10 WHO 2016 classification, refers to a specialized form of juvenile arthritis that commonly occurs in children experiencing psoriasis. This condition involves inflammation of joints which is the signature trait of arthritis. Simultaneously, psoriasis manifests as a skin condition, characterized by excessive skin cell growth leading to scaly, red patches on the skin. The remarkable link between these two conditions lies in the body's immune system, which, instead of protecting, mistakenly attacks healthy cells causing inflammation. Symptoms can range from mild to severe and may include joint pain, stiffness, and swelling, combined with the skin symptoms of psoriasis. The progression of the disease is usually fluctuating, with periods of intense symptoms (flares) followed by periods of remission. Juvenile arthritis in psoriasis affects the musculoskeletal and integumentary (skin) systems.