Young No Yoon, Presenter: Nothing to Disclose

Sungjun Kim, Abstract Co-Author: Nothing to Disclose

Kyu Hyun Yang, Abstract Co-Author: Nothing to Disclose

Yong Pyo Kim, Abstract Co-Author: Nothing to Disclose

Hyunsun Lim, Abstract Co-Author: Nothing to Disclose

To preliminarily assess the use of dual-energy X-ray absorptiometry (DXA) hip images for predicting atypical subtrochanteric fracture (ASF)

Serial pre-fracture DXA images of 52 hips from 46 female patients who sustained ASF were reviewed retrospectively. The 52 hips were divided into two groups: ipsilateral DXA group I (n=33) and contralateral DXA group C (n=19). The lateral cortical changes in DXA were categorized as focal cortical change (FC), diffuse cortical thickening (DT), or negative. Cumulative detection rates (CDR) for DXA images and for PS were compared using Cox’s proportional hazard model. To assess the enhanced screening performance, CDRs for DXA and PS were compared to PS alone.

Among the 33 hips in group I, 20 hips (60.6%) demonstrated FC, 10 hips (30.3%) demonstrated DT, and 3 hips (9.1%) demonstrated negative results. Fourteen hips (42.4%) of group I showed PS. Among the 19 hips in group C, 2 hips (10.5%) demonstrated FC, 9 hips (47.4%) demonstrated DT, and 8 hips (42.1%) demonstrated negative results. CDR of DXA for group I was higher than that of PS. CDR from the combination of DXA and PS were statistically superior to PS alone (p<0.002) for predicting ASF. CDR of group I was superior to group C (p=0.0034).

Vigilance for lateral cortical changes at the subtrochanteric area on DXA images could serve as an adjunct to PS and help predict ASF.

DXA can be used not only for the measurement of bone mineral density but for the prediction of atypical subtrochanteric fracture.

Yoon, Y, Kim, S, Yang, K, Kim, Y, Lim, H, Detection of Pre-fracture Lesions of Atypical Subtrochanteric Fracture Using Dual Energy X-ray Absorptiometry (DXA) Hip Images.  Radiological Society of North America 2012 Scientific Assembly and Annual Meeting, November 25 - November 30, 2012 ,Chicago IL. http://archive.rsna.org/2012/12024557.html