Case Reports in Orthopedics / 2019 / Article / Tab 1

Case Report

Bilateral Destructive Hip Disease from Untreated Juvenile Idiopathic Arthritis

Table 1

Six categories and definitions of juvenile idiopathic arthritis [2].

Categories of juvenile idiopathic arthritisDefinitions

Systemic arthritisArthritis in one or more joints with or preceded by fever ≥ 2 weeks’ duration and accompanied by one or more of the following:
(1) Evansecent (nonfixed) erythematous rash
(2) Generalized lymph node enlargement
(3) Hepatomegaly and/or splenomegaly
(4) Serositis

Psoriatic arthritisArthritis and psoriasis or arthritis and ≥2 of the following:
(1) Dactylitis
(2) Nail and pitting or onycholysis
(3) Psoriasis in a first-degree relative

Enthesitis-related arthritisArthritis and enthesitis or arthritis or enthesitis with ≥2 of the following:
(1) Presence of or a history of sacroiliac joint tenderness and/or inflammatory lumbosacral pain
(2) Presence of HLA-B27 antigen
(3) Onset of arthritis in a male >6 years of age
(4) Acute (symptomatic) anterior uveitis
(5) History of ankylosing spondylitis, enthesitis-related arthritis, sacroiliitis with inflammatory bowel disease, Reiter’s syndrome, or acute anterior uveitis in a first-degree relative

OligoarticularArthritis affecting 1-4 joints during the first 6 months of disease. Two subcategories:
Persistent oligoarthritis: affecting ≤4 joints throughout the disease course
Extended oligoarthritis: affecting >4 joints after the first 6 months of disease

PolyarthritisRheumatoid factor negative: arthritis affecting ≥5 joints during the first 6 months of disease; RF test is negative
Rheumatoid factor positive: arthritis affecting ≥5 joints during the first 6 months of disease; 2 or more tests for RF at least 3 months apart during the first 6 months of disease are positive

Undifferentiated arthritisArthritis that fulfills criteria in no category or in 2 or more of the above categories

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