Spontaneous Intracranial Hypotension - A Dilemma

Area of Science:

• Neurology
• Neurosurgery
• Radiology

Background:

• Spontaneous intracranial hypotension (SIH) is a frequently misdiagnosed and underdiagnosed neurological disorder.
• Accurate diagnosis and timely treatment are crucial for patient outcomes.

Purpose of the Study:

• To provide an updated overview of the evaluation and treatment strategies for spontaneous intracranial hypotension.
• To highlight key diagnostic imaging and therapeutic interventions.

Main Methods:

• This study is based on a narrative review of existing literature.
• It synthesizes current knowledge on SIH diagnosis and management.

Main Results:

• SIH diagnosis relies on spontaneous headache related to CSF leak or hypotension, though lumbar puncture is not mandatory.
• Associated symptoms include nausea, neck pain, tinnitus, and dizziness.
• Brain and spine MRI are essential for evaluation, with dynamic CT myelography identifying spinal CSF leaks.
• Epidural blood patch (EBP) is highly effective for SIH refractory to medical treatment, with up to 90% symptomatic relief.
• CSF-venous fistulas require surgical closure for definitive treatment.

Conclusions:

• SIH is a distinct clinical entity requiring a high index of suspicion for diagnosis.
• Post-contrast MRI of the brain and spinal MRI are crucial for identifying leaks.
• Epidural blood patch (EBP) is the most effective treatment for SIH.
• Subdural hematomas associated with SIH often do not require specific treatment.