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Review
. 2021 Jun 21;36(24):e177.
doi: 10.3346/jkms.2021.36.e177.

Osteonecrosis of the Femoral Head: an Updated Review of ARCO on Pathogenesis, Staging and Treatment

Affiliations
Review

Osteonecrosis of the Femoral Head: an Updated Review of ARCO on Pathogenesis, Staging and Treatment

Jeremy T Hines et al. J Korean Med Sci. .

Abstract

Non-traumatic osteonecrosis of the femoral head (ONFH) usually affects adults younger than 50 years and frequently leads to femoral head collapse and subsequent arthritis of the hip. It is becoming more prevalent along with increasing use of corticosteroids for the adjuvant therapy of leukemia and other myelogenous diseases as well as management of organ transplantation. This review updated knowledge on the pathogenesis, classification criteria, staging system, and treatment of ONFH.

Keywords: Avascular Necrosis; Femoral Head; Hip; Osteonecrosis.

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Conflict of interest statement

The authors have no potential conflicts of interest to disclose.

Figures

Fig. 1
Fig. 1. Pathogenesis of non-traumatic osteonecrosis of the femoral head.
Fig. 2
Fig. 2. Steinberg classification system of femoral head osteonecrosis. Three subsets: mild (< 15% of articular surface or head affected), moderate (15–30%), and severe (> 30%).
Fig. 3
Fig. 3. Japanese Investigation Committee classification system of femoral head osteonecrosis. Four types: type A lesion < medial 1/3 of the weight-bearing portion; type B lesion < medial 2/3 of the weight-bearing portion; type C1 lesion > medial 2/3 of the weight-bearing portion but not extending laterally to the acetabular edge; and type C2 lesion extending laterally to the acetabular edge.
Fig. 4
Fig. 4. Modified Kerboul classification system of femoral head osteonecrosis. A: necrotic angle in mid-coronal MR image. B: necrotic angle in mid-sagittal MR image. Combined necrotic angle: A + B. Three categories: small lesion (combined necrotic angle ≤ 190°), medium-sized lesion (combined necrotic angle between 190° and 240°), and large lesion (combined necrotic angle ≥ 240°).
MR = magnetic resonance.

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