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Skeletal Radiology

, Volume 43, Issue 8, pp 1151–1153 | Cite as

Subchondral insufficiency fracture of the femoral head after internal fixation for femoral neck fracture: histopathological investigation

  • Kazuhiko Sonoda
  • Takuaki Yamamoto
  • Goro Motomura
  • Hidehiko Kido
  • Yukihide Iwamoto
Case Report

Abstract

Late segmental collapse after internal fixation for femoral neck fracture is the phenomenon observed in post-traumatic osteonecrosis of the femoral head (ON), which has generally been reported to occur over a year or more after internal fixation. Subchondral insufficiency fracture of the femoral head (SIF) has also been recognized to cause femoral head collapse, however, only two cases of SIF after internal fixation for femoral neck fracture have been reported. We report a case with femoral head collapse observed 5 months after internal fixation for femoral neck fracture, which was histopathologically diagnosed as SIF. Clinically, differentiating SIF from ON is important because some cases of SIF have been reported to heal without surgical treatments. The timing of femoral head collapse after femoral neck fracture may be different between SIF and post-traumatic ON.

Keywords

Subchondral insufficiency fracture Osteonecrosis of the femoral head Femoral neck fracture 

Notes

Acknowledgement

This work was supported in part by a Grant-in-Aid for Scientific Research (No.24592266) from the Japan Society for the Promotion of Science and a Research Grant for Intractable Diseases from the Ministry of Health and Welfare of Japan.

Conflict of interest

The authors declare that they have no conflicts of interest.

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Copyright information

© ISS 2014

Authors and Affiliations

  • Kazuhiko Sonoda
    • 1
  • Takuaki Yamamoto
    • 1
  • Goro Motomura
    • 1
  • Hidehiko Kido
    • 2
  • Yukihide Iwamoto
    • 1
  1. 1.Department of Orthopaedic Surgery, Graduate School of Medical SciencesKyushu UniversityFukuoka CityJapan
  2. 2.Department of Orthopaedic SurgeryYamaguchi Red Cross HospitalYamaguchi CityJapan

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