title: Intra-articular loose body caused by avascular necrosis of the femoral head in children.
abstract: 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.
authors.affiliation: aDepartment of Orthopaedic Surgery, Asahigawa Ryoikuen bDepartment of Orthopaedic Surgery, Okayama University Hospital cDepartment of Orthopaedic Surgery, Okayama Medical Center, Okayama City, Japan.
authors.forename: Tomoko
authors.initials: T
authors.lastname: Tetsunaga
authors.forename: Hirofumi
authors.initials: H
authors.lastname: Akazawa
authors.forename: Tomonori
authors.initials: T
authors.lastname: Tetsunaga
mesh_terms: D002648:Child; D005260:Female; D005265:Femoral Neck Fractures / Q000000981:diagnostic imaging / Q000601:surgery*; D005271:Femur Head Necrosis / Q000209:etiology / Q000473:pathology / Q000601:surgery*; D005500:Follow-Up Studies; D005593:Fracture Fixation, Internal / Q000009:adverse effects* / Q000379:methods; D017102:Fracture Healing / Q000502:physiology; D006801:Humans; D008607:Intellectual Disability; D007594:Joint Loose Bodies / Q000150:complications* / Q000473:pathology; D008279:Magnetic Resonance Imaging / Q000379:methods; D010027:Osteotomy / Q000379:methods* / Q000534:rehabilitation; D011183:Postoperative Complications / Q000503:physiopathology / Q000601:surgery; D011859:Radiography; D012086:Reoperation / Q000379:methods; D018570:Risk Assessment; D012720:Severity of Illness Index; D016896:Treatment Outcome