Journal of Korean Society of Geriatric Neurosurgery 2016;12(2):163-167.
Published online September 30, 2016.
Morphological Features of the Multifidus Muscles in Osteoporotic Vertebral Compression Fractures Compared with Non-fractures: Magnetic Resonance Imaging Study
Jung Won Song , Sung Han Oh , Pyung Goo Cho , Je Beom Hong
Department of Neurosurgery, Bundang Jesaeng General Hospital, Seongnam, Korea
This study was to investigate the cross sectional area (CSA) and fat infiltration of the multifidus muscles (MFs) on magnetic resonance imaging (MRI) in postmenopausal osteoporotic vertebral compression fractures compared with non-fractures.
We reviewed MRIs and bone mineral densities (BMDs) of 126 females with osteoporosis at the time of compression fractures or non-fractures. The patients were divided into 61 patients who had osteoporotic vertebral compression fractures (group I) and 65 non-fracture patients (group II). The age was limited from 65 to 69 years in both groups. The fracture levels were restricted to thoraco-lumbar junction (TLJ) and first fractures in their life. Clinically, we investigated the current medication for osteoporosis or not. The CSA of the MFs and intervertebral discs (IVD) were measured on the L3/4 IVD level. Then we calculated the relative CSA (rCSA) to compensate for the individual body shapes. The degree of fat infiltration was estimated using three grades on the same level. All measures were independently performed by two spine neurosurgeons.
The mean age and body mass index (BMI) had no significant differences. The mean CSA and rCSA of MFs were significantly smaller in the group I compared with group II (p<0.05, p<0.05, each other). The degree of fat infiltration was significantly higher in the group I compared with group II (p<0.05).
Sarco-osteoporosis is hazardous duet for higher vertebral fracture risk. We should concern the low muscle mass and high fat infiltration of MFs potentially modifiable risk factors for osteoporotic compression fractures.
Key Words: Fractures, Compression, Multifidus, Osteoporosis, Sarcopenia

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