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Reminder of important clinical lesson
Osteonecrosis and femoro-acetabular impingement: sequelae of developmental dysplasia of the hip
  1. Jason Pui Yin Cheung1,
  2. Wang Chow2,
  3. Michael To2
  1. 1Department of Orthopaedics and Traumatology, Queen Mary Hospital, Hong Kong, Hong Kong
  2. 2Department of Orthopaedics and Traumatology, The Duchess of Kent Children’s Hospital, Hong Kong, Hong Kong
  1. Correspondence to Dr Michael To, mikektto{at}


A 2-year-old girl with developmental dysplasia of the right hip underwent open reduction and capsulorrhaphy via the anterior approach with hip spica casting in an internally rotated position. During her 26 years of follow-up, she was found to have osteonecrosis and subsequently cam-type femoro-acetabular impingement at 28 years of age. She was treated with surgical dislocation of the hip and osteochondroplasty to recreate the normal contour of the head and neck offset.

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  • Competing interests None.

  • Patient consent Obtained.

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