Bone mineral density differences between femurs of scoliotic patients undergoing dual-energy X-ray absorptiometry

作者：Bandirali M^*; Messina C; Di Leo G; Sconfienza L M; Aliprandi A; Ulivieri F M; Sardanelli F

来源：Clinical Radiology, 2013, 68(9): E511-E515.

DOI：10.1016/j.crad.2013.03.028

AIM: To investigate whether a difference exists in the bone mineral density (BMD) between femurs in scoliotic patients undergoing dual-energy X-ray absorptiometry (DXA) and whether this difference is related to spine convexity. %26lt;br%26gt;MATERIALS AND METHODS: Of 1080 consecutive patients who underwent DXA, 127 had lumbar scoliosis seen at DXA. Further, after excluding 30 patients with previous osteoporotic fractures, metallic/image artefacts, soft-tissue calcifications, the BMD differences between femurs of 97 scoliotic patients (94 females; mean age 67 +/- 11 years) were analysed. Femurs were classified as ipsilateral or contralateral to the spine convexity. Least significant change was used as a threshold of measurement precision. Differences between femoral neck BMD in respect of and regardless of spine convexity were calculated for each patient. Student%26apos;s t-test and Wilcoxon%26apos;s signed-rank test were used to assess significance. %26lt;br%26gt;RESULTS: Fifty-nine of 97 patients (61%) had left-sided scoliosis. Osteoporosis was found in 32/97 patients (33%), osteopenia in 54/97 (56%), and 11/97 (11%) had a normal T-score. Of 97 patients, 46 (47%) had ipsilateral BMD %26lt; contralateral BMD. Regardless of spine convexity, 66/97 patients (68%) had different BMD values between femurs. Among them, variation of densitometric diagnosis was seen in 29/66 patients (44%), and in 29/97 patients overall (30%). %26lt;br%26gt;CONCLUSION: Differences in the femoral neck BMD exist between femurs of scoliotic patients undergoing DXA. Thus, bilateral femoral DXA acquisition is recommended.

• 出版日期2013-9