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Skeletal Radiology

, Volume 28, Issue 11, pp 621–627 | Cite as

A clinicopathologic study of transient osteoporosis of the hip

  • T. Yamamoto
  • Toshikazu Kubo
  • Yasusuke Hirasawa
  • Yasuo Noguchi
  • Yukihide Iwamoto
  • Katsuo Sueishi
Article

Abstract 

Objective. It has been proposed that transient osteoporosis of the hip (TOH) may represent the early reversible phase of osteonecrosis of the femoral head (ON). The purpose of this study was to investigate the clinicopathologic characteristics of three cases of TOH.

Design and patients. A bone biopsy was performed on three patients who had been diagnosed as having TOH based on the clinical course, radiograph, bone scintigram, and MR images. The biopsy specimens were studied histopathologically by light and electron microscopy.

Results. The most characteristic feature of TOH was focal areas of thin and disconnected bone trabeculae covered by osteoid seams and active osteoblasts. The surrounding bone marrow tissue showed edematous changes and mild fibrosis, frequently associated with vascular congestion and/or interstitial hemorrhage. No osteonecrotic region was observed in either the bone trabeculae or the bone marrow tissue. All patients have improved clinically and in the 3.5–9 years of follow-up have shown no evidence of ON.

Conclusions. This study supports the concept that transient osteoporosis of the hip is a distinct entity.

Key words Transient osteoporosis of the hip Osteonecrosis Osteopenia Bone marrow edema Femoral head 

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Copyright information

© International Skeletal Society 1999

Authors and Affiliations

  • T. Yamamoto
    • 1
  • Toshikazu Kubo
    • 3
  • Yasusuke Hirasawa
    • 3
  • Yasuo Noguchi
    • 1
  • Yukihide Iwamoto
    • 1
  • Katsuo Sueishi
    • 2
  1. 1.Department of Orthopaedic Surgery, Faculty of Medicine, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812–8582, JapanJP
  2. 2.Department of Pathology, Faculty of Medicine, Kyushu University, Fukuoka, JapanJP
  3. 3.Department of Orthopaedic Surgery, Kyoto Prefectural University of Medicine, Kyoto, JapanJP

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