Abstract
Objective: The aim of this study was to identify the risk factors associated with the prognosis of a subchondral insufficiency fracture of the femoral head (SIF). Methods: Between June 2002 and July 2009, 25 patients diagnosed with SIF were included in this study. Sequential radiographs were evaluated for the progression of collapse. Clinical profiles, including age, body mass index, follow-up period and Singh's index, were documented. The morphological characteristics of the low-intensity band on T 1 weighted MRI were also examined with regards to four factors: band length, band thickness, the length of the weight-bearing portion and the band length ratio (defined as the proportion of the band length to the weight-bearing portion of the femoral head in the slice through the femoral head centre). Results: Radiographically, a progression of collapse was observed in 15 of 25 (60.0%) patients. The band length in patients with progression of collapse [22.5 mm; 95% confidence interval (CI) 17.7, 27.3] was significantly larger than in patients without a progression of collapse (13.4 mm; 95% CI 7.6, 19.3; p<0.05). The band length ratio in patients with progression of collapse (59.8%; 95% CI 50.8, 68.9) was also significantly higher than in patients without a progression of collapse (40.9%; 95% CI 29.8, 52.0; p<0.05). No significant differences were present in the other values. Conclusion: These results indicate that the band length and the band length ratio might be predictive for the progression of collapse in SIF.
| Original language | English |
|---|---|
| Pages (from-to) | 214-218 |
| Number of pages | 5 |
| Journal | British Journal of Radiology |
| Volume | 85 |
| Issue number | 1011 |
| DOIs | |
| Publication status | Published - Mar 1 2012 |
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All Science Journal Classification (ASJC) codes
- Radiology Nuclear Medicine and imaging
Cite this
Prognostic factors associated with a subchondral insufficiency fracture of the femoral head. / Iwasaki, K.; Yamamoto, Takuaki; Motomura, G.; Ikemura, S.; Mawatari, T.; Nakashima, Y.; Iwamoto, Y.
In: British Journal of Radiology, Vol. 85, No. 1011, 01.03.2012, p. 214-218.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Prognostic factors associated with a subchondral insufficiency fracture of the femoral head
AU - Iwasaki, K.
AU - Yamamoto, Takuaki
AU - Motomura, G.
AU - Ikemura, S.
AU - Mawatari, T.
AU - Nakashima, Y.
AU - Iwamoto, Y.
PY - 2012/3/1
Y1 - 2012/3/1
N2 - Objective: The aim of this study was to identify the risk factors associated with the prognosis of a subchondral insufficiency fracture of the femoral head (SIF). Methods: Between June 2002 and July 2009, 25 patients diagnosed with SIF were included in this study. Sequential radiographs were evaluated for the progression of collapse. Clinical profiles, including age, body mass index, follow-up period and Singh's index, were documented. The morphological characteristics of the low-intensity band on T 1 weighted MRI were also examined with regards to four factors: band length, band thickness, the length of the weight-bearing portion and the band length ratio (defined as the proportion of the band length to the weight-bearing portion of the femoral head in the slice through the femoral head centre). Results: Radiographically, a progression of collapse was observed in 15 of 25 (60.0%) patients. The band length in patients with progression of collapse [22.5 mm; 95% confidence interval (CI) 17.7, 27.3] was significantly larger than in patients without a progression of collapse (13.4 mm; 95% CI 7.6, 19.3; p<0.05). The band length ratio in patients with progression of collapse (59.8%; 95% CI 50.8, 68.9) was also significantly higher than in patients without a progression of collapse (40.9%; 95% CI 29.8, 52.0; p<0.05). No significant differences were present in the other values. Conclusion: These results indicate that the band length and the band length ratio might be predictive for the progression of collapse in SIF.
AB - Objective: The aim of this study was to identify the risk factors associated with the prognosis of a subchondral insufficiency fracture of the femoral head (SIF). Methods: Between June 2002 and July 2009, 25 patients diagnosed with SIF were included in this study. Sequential radiographs were evaluated for the progression of collapse. Clinical profiles, including age, body mass index, follow-up period and Singh's index, were documented. The morphological characteristics of the low-intensity band on T 1 weighted MRI were also examined with regards to four factors: band length, band thickness, the length of the weight-bearing portion and the band length ratio (defined as the proportion of the band length to the weight-bearing portion of the femoral head in the slice through the femoral head centre). Results: Radiographically, a progression of collapse was observed in 15 of 25 (60.0%) patients. The band length in patients with progression of collapse [22.5 mm; 95% confidence interval (CI) 17.7, 27.3] was significantly larger than in patients without a progression of collapse (13.4 mm; 95% CI 7.6, 19.3; p<0.05). The band length ratio in patients with progression of collapse (59.8%; 95% CI 50.8, 68.9) was also significantly higher than in patients without a progression of collapse (40.9%; 95% CI 29.8, 52.0; p<0.05). No significant differences were present in the other values. Conclusion: These results indicate that the band length and the band length ratio might be predictive for the progression of collapse in SIF.
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UR - http://www.scopus.com/inward/citedby.url?scp=84863273213&partnerID=8YFLogxK
U2 - 10.1259/bjr/44936440
DO - 10.1259/bjr/44936440
M3 - Article
C2 - 21159802
AN - SCOPUS:84863273213
VL - 85
SP - 214
EP - 218
JO - British Journal of Radiology
JF - British Journal of Radiology
SN - 0007-1285
IS - 1011
ER -