Idiopathic Spinal Epidural Fat Accumulation Is Associated With Hyperlipidemia

Area of Science:

• Neurosurgery
• Spinal Surgery
• Metabolic Disorders

Background:

• Spinal epidural lipomatosis (SEL) involves excess adipose tissue in the epidural space, potentially causing spinal cord compression.
• The exact causes of idiopathic SEL remain unclear, necessitating further investigation into associated factors.

Purpose of the Study:

• To investigate the clinical characteristics and potential contributing factors of idiopathic spinal epidural lipomatosis (SEL).
• To identify associations between SEL and patient demographics, comorbidities, and clinical outcomes in lumbar spinal canal stenosis (LSS).

Main Methods:

• Retrospective analysis of 166 male patients undergoing surgery for lumbar spinal canal stenosis (LSS).
• Patients were categorized into three groups based on the severity of epidural lipomatous lesions.
• Data collected included BMI, comorbidities, blood tests, and preoperative clinical scores; multivariate analysis was used to identify associated factors.

Main Results:

• Patients with severe SEL exhibited significantly higher BMI and elevated serum total cholesterol and triglyceride levels compared to controls.
• SEL patients reported increased pain frequency and reduced walking ability preoperatively.
• Multivariate analysis identified hyperlipidemia as a significant factor associated with idiopathic SEL (OR=3.74).

Conclusions:

• Aberrant lipid metabolism appears to be implicated in the pathogenesis of idiopathic SEL.
• Patients with LSS and idiopathic SEL experience more severe pain compared to those without SEL.