CSF Leaks & Spontaneous Intracranial Hypotension (SIH)
This resource provides authoritative information regarding spinal CSF leaks and SIH for both patients and healthcare professionals. Mr Parag Sayal is a Consultant Neurosurgeon and Clinical Lead for Spinal Surgery at the National Hospital for Neurology and Neurosurgery, Queen Square, London, specialising in the management of these complex conditions.
Understanding CSF Leaks & SIH
A spinal CSF (Cerebrospinal Fluid) leak occurs when the protective membrane surrounding the spinal cord develops a hole or tear, allowing fluid to escape. This fluid normally cushions the brain and spine, maintaining necessary pressure for neurological health.
Spontaneous Intracranial Hypotension (SIH) is the clinical condition resulting from such a leak. When fluid volume decreases, the brain effectively 'sinks' within the skull, often causing severe positional headaches and a range of other neurological symptoms.Â
Symptoms & Diagnosis
Clinical Presentation
Specialist Assessment
The hallmark of SIH is often an orthostatic headache—one that worsens when standing and improves when lying flat. Other symptoms can include neck pain, hearing changes, dizziness, and cognitive changes.Â
Diagnosis requires a comprehensive assessment and advanced imaging, which may include specialised MRI brain and spine protocols, CT myelography, or digital subtraction myelography to precisely locate the site of the leak.Â
Treatment
The management of CSF leaks and Spontaneous Intracranial Hypotension (SIH) is tailored to the individual, ranging from conservative strategies to advanced neurosurgical interventions.Â
Conservative Measures
Initial management often involves flat bed rest and increased hydration to improve symptoms while the body attempts to heal the leak.Â
Epidural Blood Patches
A common second-line treatment involving the injection of the patient's own blood into the epidural space to seal the leak effectively.Â
Specialist Neurosurgery
When conservative and minimally invasive approaches are insufficient, specialist neurosurgical techniques may be employed to repair complex dural defects.Â
Research & Publications
2022 – Featured publication
Targeted detection and repair of a spinal dural defect [...]
Journal: Neurological Sciences
A case report describing targeted identification and repair of a spinal dural defect in a patient with classical infratentorial superficial siderosis, with biochemical evidence of resolution following repair.
2022 – Featured publication
Classical infratentorial superficial siderosis of the central nervous system [...]
Journal: Practical Neurology
A clinical review of the pathophysiology, presentation and management of classical infratentorial superficial siderosis, including its relationship with spinal dural pathology.
2021 – Featured publication
Neuropsychological and neuroimaging characteristics of classical superficial siderosis
Journal: Journal of Neurology
Research examining the neuropsychological and neuroimaging characteristics associated with classical superficial siderosis.
