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Orthopaedics · Paediatric orthopaedics: childhood discitis
Sample itemA 3-year-old refuses to walk or sit and has low-grade fever. She stands with a rigid, flexed lumbar spine, and ESR is raised. Initial radiographs are normal, but a repeat film weeks later shows narrowing of the L4-L5 disc space. What is the diagnosis?
Original practice item, not a recalled exam question. Nothing here is recorded.
The answer and the reasoning
A. Infection of the intervertebral disc (discitis)
Discitis presents in young children with refusal to walk, back pain and a raised ESR, with disc narrowing appearing late on radiographs. MRI is the best test, Staphylococcus aureus is the usual organism, and treatment is antibiotics with rest.
Option by option
A. Infection of the intervertebral disc (discitis) (correct)
Correct. Back pain with refusal to bear weight and a narrowing disc is discitis.
B. Scheuermann disease
Scheuermann disease is a kyphosis of adolescents with wedged vertebrae.
C. Spondylolysis
Spondylolysis is a stress fracture of the pars in older active children and does not cause fever.
D. Transient synovitis of the hip
Transient synovitis affects the hip and does not narrow a disc space.
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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