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Management of hydromyelia
1Division of Pediatric Neurosurgery, New York University Medical Center, New York.
Insights
This study details surgical management for 22 hydromyelia patients, using MRI and ultrasound to guide interventions like decompression and shunts. Outcomes varied based on the underlying cause, highlighting tailored treatment approaches.
Area of Science:
- Neurosurgery
- Pediatric Neurology
- Spinal Cord Disorders
Background:
- Hydromyelia, a condition involving fluid-filled cavities within the spinal cord, presents diverse etiologies and clinical manifestations.
- Management strategies for hydromyelia are often tailored to the specific underlying cause, such as Chiari malformations, myelomeningoceles, or tethered cords.
Purpose of the Study:
- To review the surgical management experience with 22 patients diagnosed with hydromyelia.
- To evaluate the effectiveness of different surgical interventions based on preoperative and intraoperative neurodiagnostic findings.
Main Methods:
- Preoperative magnetic resonance imaging (MRI) and intraoperative ultrasound were utilized for diagnosis and surgical planning.
- Surgical interventions included hindbrain decompression, myelotomy with cyst drainage, stenting, obex plugging, cyst-pleural shunting, and modified terminal ventriculostomy, depending on the specific condition.
Main Results:
- The study included patients with Chiari malformations, myelomeningoceles, tethered cords, and post-arachnoiditis cavitation.
- Common presentations included progressive scoliosis, pain, and Lhermitte's phenomenon, with classical symptoms like brachial amyotrophy being less frequent.
- Patients with tethered cords were often asymptomatic regarding their spinal cord cavities.
Conclusions:
- Tailored surgical approaches guided by advanced imaging (MRI and ultrasound) are crucial for managing hydromyelia.
- The specific etiology of hydromyelia significantly influences the choice of surgical intervention and patient outcomes.
- Intraoperative ultrasound is valuable for precise surgical decision-making, particularly in cases involving the obex.
Abstract:
The authors review their experience in the management of 22 patients with hydromyelia over a 26-month period. Ten children had Chiari I malformations and hydromyelia; 4 children had myelomeningoceles (3 with large thoracic spinal cord cavitations and 1 with cervical hydromyelia); 6 children had distal hydromyelia associated with tethered cords and occult dysraphism; and 2 patients had cavitation subsequent to arachnoiditis. All patients were investigated preoperatively with MRI and intraoperatively with ultrasound. These neurodiagnostic examinations dictated the type of surgical intervention. Patients with Chiari I or Chiari II malformations, cervical hydromyelia, or basal arachnoiditis underwent decompression of the hindbrain malformations, myelotomy with drainage of the cyst, and placement of a stent. When the area of hydromyelia extended to the obex, as demonstrated by intraoperative ultrasound, the obex was plugged. Cyst-pleural shunts were placed in the children who had myelomeningoceles and thoracic hydromyelia. Patients with distal hydromyelia underwent modified terminal ventriculostomy. The classical presentation of brachial amyotrophy and dissociated sensory loss was present in only 3 patients. Progressive scoliosis without neurological deficit, pain, and Lhermitte's phenomenon were common presentations. The patients with tethered cords were generally asymptomatic from their cysts. The authors discuss operative technique, utilization of intraoperative ultrasound, and surgical outcome.