Original Article

Analysis of paraspinal muscle group density value changes on CT in patients with lumbar spondylolisthesis

Gokhan Cavus1, Yeliz Cavus2

1Department of Neurosurgery, Adana City Training and Research Hospital, Adana, Turkey
2Department of Radiology, Adana City Training and Research Hospital, Adana, Turkey


Background: The aim of this study is to evaluate the density changes and cross-sectional area (CSA) changes in the bilateral psoas muscles at the L3 level in cases with lumbar degenerative spondylolisthesis and to compare their relationship with the spondylolisthesis degree.
Methods: A total of 300 patients,150 patients in the control group and 150 patients with degenerative lumbar spondylolisthesis detected in computed tomography (CT) was included in the study. The patients' ages, gender, spondylolisthesis levels, spondylolisthesis degrees, right and left CSA of the psoas muscle at the L3 level, and right and left density region of interest (ROI) values of the psoas muscle were measured in terms of Hounsfield Unite (HU) and evaluated. Spondylolisthesis levels and degrees of the patients, psoas muscle bilateral CSA at the L3 level, bilateral psoas densities (HU) at the L3 level were measured
Results: The average age of the cases in the spondylolisthesis patient group was 55.11+-10.90 years, and the average age of the participants in the control group was 54.67+-11.00. The means of right psoas CSA, right psoas density, left psoas CSA, and left psoas density of cases in the patient group with spondylolisthesis were significantly lower than the averages of the control group participants (p<0.05). According to the Binary Logistic Regression Analysis, it was found that the increase in the right psoas density values significantly decreased the risk of the listhesis grade level being at the pathological level (OR=0.87; p=0.022).
Conclusions: In our study, it was found that the psoas muscle CSA and psoas muscle density measured at the L3 level in spondylolisthesis patients decreased significantly compared to the psoas muscle CSA and psoas muscle density of the control group participants. However, it was revealed that the degree of spondylolisthesis did not make a statistically significant difference in the CSA and density of the psoas muscle.

Keywords: degenerative; density; lumbar; psoas; spondylolisthesis