Spontaneous spinal cerebrospinal fluid leaks: a review

Area of Science:

• Neurology
• Neurosurgery
• Radiology

Background:

• Spontaneous intracranial hypotension (SIH) is an underdiagnosed cause of headache, affecting approximately 1 in 50,000 individuals.
• Symptoms are variable, including headache, neck stiffness, cranial nerve dysfunction, and herniation syndromes.
• Spinal cerebrospinal fluid (CSF) leakage is the most common etiology, often linked to meningeal weakness and minor trauma.

Purpose of the Study:

• To review the clinical presentation, diagnostic methods, and treatment strategies for spontaneous intracranial hypotension.
• To highlight the importance of recognizing SIH and its underlying causes.

Main Methods:

• Review of typical magnetic resonance imaging (MRI) findings: diffuse pachymeningeal enhancement, subdural collections, and brain displacement.
• Analysis of cerebrospinal fluid (CSF) findings: low opening pressure, pleocytosis, elevated protein, and xanthochromia.
• Emphasis on computed tomography (CT) myelography for precise localization of CSF leaks, commonly at the cervicothoracic or thoracic spine.

Main Results:

• SIH presents with a wide range of neurological symptoms.
• MRI and CT myelography are key diagnostic tools for identifying CSF leaks.
• Lumbar epidural blood patch is the primary treatment, with surgical repair as an alternative if conservative measures fail.

Conclusions:

• Spontaneous intracranial hypotension is a treatable cause of headache, often due to spinal CSF leaks.
• Accurate diagnosis relies on a combination of clinical, imaging, and CSF analysis.
• Effective management typically involves epidural blood patching or surgical intervention.