Some genetic skeletal dysplasias as forms of mucopolysaccharidosis especially type1 Scheie syndrome, progressive pseudorheumatoid dysplasia and multicentric osteolysis, nodulosis, and arthropathy syndrome may also mimic JIA, as they may present with joint swelling, joint restriction, stiffness, and pain. The clinical and radiologic overlap between genetic skeletal dysplasias and JIA can be great that molecular analysis may be need to confirm the diagnosis. Rarely, metabolic diseases, such as Farber disease may also mimic JIA. Patients with Farber disease typically have subcutaneous nodules and a hoarse or weak voice due to growth of nodules on the larynx. Treatment
The major emphasis of the treatment of JIA is helping the child or young person regain normal levels of physical and social functioning by controlling inflammation and extra-articular symptoms. Clinical remission should be the primary target for all patients and treatment should be adjusted until this is achieved. Prompt recognition and management is important as early initiation of therapy increases the likelihood of a response to first-line treatments and of achieving drug-free remission later in life. While overarching consensus treatment guidelines exist, all treatments should be specifically tailored to the individuals needs in discussion with the child or young person and their family.Optimal management of JIA requires a multidisciplinary team working to address the needs of an individual patient. Optimising physical and social functioning is accomplished via a two-pronged approach: non-pharmacological strategies such as physical therapies, pain management strategies, and social supports; and the swift use of medication to control inflammation and extra-articular symptoms.
These terms were replaced in 1997 with the release of the revised ILAR (International League of Associations for Rheumatology) classification criteria.There is currently an international movement underway to further revise the classification criteria for JIA, although this is in a preliminary phase.MeSH uses "juvenile arthritis" as the primary entry, and uses "idiopathic", "chronic" and "rheumatoid" in alternate entries. Society
Some famous people with this condition are:

Antoni Gaudi, architect
Clark Middleton, actor
Claire Cottrill, singer-songwriter
Rosemary Sutcliff, author

References
External links
Arthritis Australia, Juvenile Idiopathic Arthritis
JIA@NRAS (UK)
JIA - NIH Medline Plus.