MedGen

A rare pediatric inflammatory rheumatic disease characterized by the presence of arthritis accompanied by either psoriasis or at least two of the following supporting features; presence of nail pitting, onycholysis, dactylitis, or a family history of psoriasis in a first degree relative. Patients are younger than 16 years of age and the disease lasts longer than 6 weeks. [from ORDO]

An older, deprecated term that encompassed three major types of autoimmune or autoinflammatory arthritis in children: systemic-onset, pauciarticular, or polyarticular arthritis. The juvenile rheumatoid arthritis classification system has been replaced by the International League of Associations for Rheumatology (ILAR) juvenile idiopathic arthritis classification system. [from NCI]

A rare, heterogeneous group of rheumatologic diseases characterized by arthritis which has an onset before 16 years of age, persists for more than 6 weeks, and is of unknown origin. [from ORDO]

A type of arthritis that affects up to four joints in the first six months of disease. [from HPO]

An arthritis affecting five or more separate joints. [from NCI]

A rare inflammatory rheumatic disease in a child younger than 16 years characterized by arthritis and/or enthesitis and/or acute anterior uveitis. The most commonly affected joints at diagnosis are the knees, ankles, and hips. The small joints of the feet and toes are also often involved. [from ORDO]

Inflammation at the site of insertion of ligaments, tendons, and other fibrous structures into bone. [from NCI]

A clinical course finding indicating that a disease presents with systemic manifestations. [from NCI]