Comparison of levels of toxic trace elements in two most common spinal pathologies in three different tissues

Aim: The toxic trace element levels in serum, bone (lamina), and intervertebral disc tissues of patients with lumbar spinal stenosis and lumbar herniated nucleus pulposus (HNP) which are the two most common spinal pathologies were determined, and it was investigated whether they have a role in the pathophysiology of these pathologies. Materials and methods: Cadmium (Cd), aluminium (Al), arsenic (As), mercury (Hg), and lead (Pb) levels in serum, intervertebral disc, and bone (lamina) tissue of patients with HNP (=20) and 30 with lumbar spinal stenosis (LSS) (n=30) were determined by Inductively Coupled Plasma Mass Spectrometry technique. Results: LDH group Cd serum level was found to be significantly higher than LSS group Cd serum level (p=0.024). The Al disc level in the HNP group was found to be significantly higher than the Al disc level in the LSS group (p=0.038). While As serum level increased in LDH group, it was determined that As bone level increased very significantly (r= 0.699, p=0.001). In the LSS group, it was determined that the Hg disc level increased significantly as the Hg serum level increased (r=0.608, p<0.01). On the other hand, as the Hg serum level increased in the LDH group, the Hg disc level also decreased significantly (r= -0.579, p<0.01). Conclusion: The difference in toxic trace element levels seen in these pathologies has been discussed in terms of possible causes in light of current literature. The findings of our study support the hypothesis that toxic trace elements may be effective in lumbar disc degeneration.