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Pediatrics · Rheumatology: juvenile idiopathic arthritis
Sample itemA child has persistent swelling and limitation of a knee for more than six weeks, with no infection or trauma. What diagnosis should be considered?
Original practice item, not a recalled exam question. Nothing here is recorded.
The answer and the reasoning
C. Juvenile idiopathic arthritis
Juvenile idiopathic arthritis is chronic inflammatory arthritis beginning before age 16 and persisting at least six weeks after other causes are excluded. Uveitis screening is important in susceptible subtypes.
Option by option
A. Transient synovitis only
Transient synovitis resolves sooner and usually affects the hip.
B. Septic arthritis by definition
Septic arthritis is an acute emergency with systemic illness and requires exclusion, but not every chronic arthritis is septic.
C. Juvenile idiopathic arthritis (correct)
Correct. Persistent unexplained inflammatory arthritis meets the key clinical threshold.
D. Osgood-Schlatter disease
Osgood-Schlatter disease causes tibial-tubercle pain rather than persistent synovitis.
Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.
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