Untreated Asymptomatic Hips in Patients With Osteonecrosis of the Femoral Head

Authors
Byung-Woo MinKwang-Soon SongChul-Hyun ChoSung-Moon LeeKyung-Jae Lee
Department
Dept. of Orthopedic Surgery (정형외과학); Dept. of Radiology (영상의학)
Issue Date
2008
Citation
Clinical Orthopaedics and Related Research, Vol.466(5) : 1087-1092, 2008
ISSN
0009-921X
Abstract
Because there is no consensus regarding the factors predicting femoral head collapse in asymptomatic osteonecrosis of the hip, we studied the risk factors for collapse. Between 1990 and 2000, we used MRI to confirm asymptomatic osteonecrosis of the femoral head in 81 patients (81 hips) whose other hip had nontraumatic symptomatic osteonecrosis and we monitored them prospectively. The minimum followup was 5 years (mean, 8.3 years; range, 5–16 years). At the latest followup, 31 hips (38%) were symptomatic and 26 hips (32%) had collapsed. The mean interval between diagnosis and collapse was 4.1 years. We observed no correlation between femoral head collapse and patients’ age, gender, weight, presumed cause of osteonecrosis, or length of followup. With combined factors, only extent of large necrotic lesion (hazard ratio, 4.06; 95% confidence interval, 1.29–12.77) and location of Type C2 necrotic lesion (hazard ratio, 6.35; 95% confidence interval, 1.18–34.11) predicted collapse. Level of Evidence: Level I, prognostic study. See the Guidelines for Authors for a complete description of levels of evidence.
URI
http://kumel.medlib.dsmc.or.kr/handle/2015.oak/35518
Appears in Collections:
1. Journal Papers (연구논문) > 1. School of Medicine (의과대학) > Dept. of Orthopedic Surgery (정형외과학)
1. Journal Papers (연구논문) > 1. School of Medicine (의과대학) > Dept. of Radiology (영상의학)
Keimyung Author(s)
민병우; 송광순; 조철현; 이경재; 이성문
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