Ventral Displacement of Spinal Cord in Spontaneous Intracranial Hypotension: A Sign Easily Be Overlooked.

Purpose: Spontaneous intracranial hypotension (SIH) is suspected in patients presenting orthostatic headache and needs excluding structural or iatrogenic causes. Image studies are required to confirm the diagnosis and define exact locations of cerebrospinal fluid leakage, but currently there is no single study sensitive enough to make identifications among patients with various symptoms.

Case report: We present a 24-year-old young woman having acute orthostatic headache. She denied having previous headache, head trauma, or neuraxial procedures like lumbar punctures. Brain magnetic resonance image (MRI) with gadolinium enhancement reported normal findings on arrival. She received conservative treatment including analgesics and aggressive intravenous hydration, but her headache improved little. Whole spine MRI with gadolinium enhancement revealed no obvious leakage of cerebrospinal fluid but typical dilated epidural veins with ventral displacement of her thoracic spinal cord. After autologous epidural blood patches therapy, her headache relieved completely.

Conclusion: We review the typical and uncommon findings of spinal MRI in SIH, which is more sensitive than brain MRI in acute stages. Spinal MRI offers the diagnostic value in SIH especially when cranial images do not respond in time.