ArticleInternational orthopaedics2025
Discrepancy between radiography and magnetic resonance imaging in Japanese Investigation Committee classification type C osteonecrosis of the femoral head.
Article in International orthopaedics, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed.
- [Finite element analysis of CT-based lateral classification of Japanese Investigation Committee type C1 osteonecrosis of femoral head and its prognostic value].Zhongguo xiu fu chong jian wai ke za zhi = Zhongguo xiufu chongjian waike zazhi = Chinese journal of reparative and reconstructive surgery · 2026Article
- Chinese expert consensus on the clinical application of stromal vascular fraction combined with bone marrow flushing for osteonecrosis of the femoral head.Journal of orthopaedic translation · 2026Review
- Postoperative computed tomography-based intact ratio predicts femoral head collapse after curved intertrochanteric varus osteotomy for osteonecrosis of the femoral head.International orthopaedics · 2026Article
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5 authors.
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Abstract
purposeThe Japanese Investigation Committee (JIC) classification for osteonecrosis of the femoral head (ONFH) is based on the necrotic area relative to the weight-bearing surface on anteroposterior (AP) radiographs or central coronal MRI. Discrepancies exist between these methods, potentially related to the AP necrosis area. This study evaluated these discrepancies and the extent of AP necrotic lesions.
methodsWe retrospectively reviewed 139 patients (188 hips) with nontraumatic ONFH, JIC type C1 or C2 on radiography, and collapse < 3 mm. Cases with and without discrepancies between radiography and MRI were designated as discrepancy and consistent groups, respectively. We assessed the proportion of patients in the discrepancy group and survival rates in both groups, with femoral head collapse > 3 mm as the endpoint. The cutoff value for AP necrotic regions on lateral radiographs identifying discrepancies was calculated using ROC curve analysis.
resultsThe discrepancy group comprised 28 hips (14.9%) vs. 160 hips in the consistent group. Five-year survival rates were 73.3% vs. 31.9% (P < 0.01), and AP necrotic region extent was 61.2 vs. 73.8 mm (P < 0.001) in discrepancy vs. consistent groups. The cutoff value for necrotic region extent revealing discrepancies was 66.9% (AUC 0.833, sensitivity 83.8%, specificity 82.4%).
conclusionPatients with AP necrotic regions < 66.9% were more likely to show discrepancies between radiography and MRI in type classification. This study can help improve accuracy in assessing ONFH severity and prognosis.
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