Noninfectious arthritis | |
Hemarthrosis | May be the first presentation of bleeding disorder |
Inflammatory bowel disease | Extra-articular manifestations include abdominal pain, diarrhea, growth failure, weight loss, rectal bleeding, perianal skin tags, and dermatologic findings (eg, erythema nodosum, pyoderma gangrenosum) |
Juvenile idiopathic arthritis | Joints are warm and markedly swollen, but not especially painful (patient remains ambulatory); the hip is rarely the initial joint; gradual onset of symptoms |
Psoriatic arthritis | Positive family history, nail pitting, psoriatic rash; painful tendon or ligament insertions (enthesitis) |
Kawasaki disease | Fever; conjunctivitis; erythema of the lips and oral mucosa; rash; extremity changes; lymphadenopathy |
Serum sickness | Rash (usually urticarial); fever; lymphadenopathy; polyarthralgia or polyarthritis, beginning 1 to 2 weeks after exposure to the inciting agent; usually involves the metacarpophalangeal joints, knees, wrists, ankles, and shoulders; swelling and erythema are uncommon |
Henoch-Schönlein purpura | Palpable purpura; arthritis/arthralgia; abdominal pain; renal disease |
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