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Intra-articular loose body caused by avascular necrosis of the femoral head in children

Tetsunaga, Tomokoa,b; Akazawa, Hirofumia; Tetsunaga, Tomonoric

Journal of Pediatric Orthopaedics B: January 2014 - Volume 23 - Issue 1 - p 44–48
doi: 10.1097/01.bpb.0000434244.41569.6b

In children, avascular necrosis of the femoral head occurs easily because of the difference in the domination of blood flow compared with that in adults. Here we report a rare case of a 12-year-old girl who sustained a femoral neck fracture. The femoral head collapsed after open reduction and internal fixation. The hip developed into subluxation because of the gradually enlarged loose body in association with avascular necrosis. These results might be explained by the fact that blood circulation from the ligamentum teres temporarily increases during the ages of 8–12 years.

aDepartment of Orthopaedic Surgery, Asahigawa Ryoikuen

bDepartment of Orthopaedic Surgery, Okayama University Hospital

cDepartment of Orthopaedic Surgery, Okayama Medical Center, Okayama City, Japan

Correspondence to Tomonori Tetsunaga, MD, Department of Orthopaedic Surgery, Okayama Medical Center, 1711-1 Tamasu, Kitaku, Okayama City 701-1192, Japan Tel: +81 86 294 9911; fax: +81 86 294 9255; e-mail:

© 2014 by Lippincott Williams & Wilkins, Inc.