Paediatric Orthopaedics · NEET PG Preparation Orthopaedics

A 6-year-old boy presents with a 2-month history of painless limp and restricted movements of the right hip, particularly abduction and internal rota…

Practice question from Paediatric Orthopaedics (NEET PG Preparation Orthopaedics), with the correct answer and a step-by-step solution.

hard · MCQ · Q-C84567

A 6-year-old boy presents with a 2-month history of painless limp and restricted movements of the right hip, particularly abduction and internal rotation. Radiography shows sclerosis, fragmentation, and flattening of the right femoral head. Bone scintigraphy confirms avascular necrosis of the femoral epiphysis. What is the primary therapeutic goal in the management of this patient?

  1. A.Immediate open reduction and internal fixation with dynamic hip screw
  2. B.Containment of the femoral head within the acetabulum to prevent deformationCorrect answer
  3. C.Complete bed rest with bilateral skeletal traction until complete re-ossification
  4. D.High-dose oral bisphosphonates to reverse epiphyseal resorption

Solution

The child has Legg-Calve-Perthes disease (idiopathic avascular necrosis of the femoral head). The primary treatment goal is 'containment'—keeping the softened femoral head deep within the true acetabulum so that the acetabulum acts as a mold, preventing collapse and subsequent coxa magna or hinge abduction. Containment can be achieved by bracing or surgical osteotomies (femoral or pelvic).

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