Surgery for Intradural Spinal Tumors: Microsurgical Removal with Laminoplasty
Removing a tumor from inside the spinal dura is precise, unhurried microsurgery. The spinal canal is opened from the back, the dura is opened under the microscope, and the tumor is separated from the spinal cord and nerve roots millimeter by millimeter while their function is monitored continuously. The dura is then closed watertight and the bone is put back. For most intradural tumors, this is curative.
Two things distinguish Dr. Daggubati’s approach. First, the opening is kept as small as the tumor allows, using intraoperative ultrasound to confirm the tumor’s position before the dura is opened. Second, the bone removed to reach the tumor is replaced as a laminoplasty whenever possible, so the spine keeps its normal structure and, in almost all cases, no screws or rods are needed.
Who it is for
- Intradural extramedullary tumors: schwannoma, neurofibroma, meningioma
- Intramedullary tumors with a surgical plane: ependymoma, hemangioblastoma, selected astrocytomas
- Myxopapillary ependymoma of the filum terminale
- Tumors causing symptoms or documented growth on serial MRI
Why we use it
- Complete removal and cure for most benign tumors
- No screws or rods in the large majority of cases
- Laminoplasty preserves the spine’s structure and reduces later deformity
- Continuous monitoring protects cord and nerve function
- Small, level-specific exposure
How the procedure is done
- Positioning and monitoring. General anesthesia, positioned face-down. Electrodes monitor motor and sensory pathways (MEPs and SSEPs) and, for tumors near nerve roots, the roots themselves. Any change during surgery is seen in real time.
- Exposure. A midline incision over the tumor level only, guided by X-ray. The lamina over the tumor is removed as a single piece with a fine saw (laminoplasty), or a narrow laminectomy is made, preserving the facet joints that keep the spine stable.
- Ultrasound. Before the dura is opened, ultrasound through the dura confirms the tumor is fully exposed, so the opening is exactly where it needs to be and no larger.
- Opening the dura. Under the operating microscope the dura is opened in the midline and held back with fine sutures; the arachnoid membrane beneath is opened to release spinal fluid and expose the tumor.
- Removing the tumor. Extramedullary tumors are first debulked from the inside, then their capsule is separated from the cord and nerve roots. A schwannoma’s parent root (usually sensory) is divided; a meningioma is taken with its dural attachment, or the attachment is coagulated. Intramedullary tumors are reached through a midline opening in the cord (myelotomy) and removed along the plane between tumor and cord, with monitoring guiding how far to go.
- Closure of the dura. The dura is sutured watertight, tested by asking the anesthesiologist to raise pressure briefly, and reinforced with a sealant. This step prevents spinal fluid leak, the most common complication.
- Laminoplasty. The bone that was removed is put back in place and secured with small titanium plates, restoring the roof of the canal. Muscles and skin are closed in layers.
Recovery
Flat in bed for a period after surgery to protect the dural closure, then walking from the first or second day. Hospital stay of two to four nights. Incision care and activity limits follow the post-operative guide; no lifting over ten pounds and no bending or twisting for six weeks. Numbness or tingling in the distribution of a divided sensory root is common and usually mild. MRI at three months confirms complete removal, then at intervals for several years.
Risks, stated plainly
Spinal fluid leak (the most common, usually managed with bed rest, occasionally a second closure), new numbness or weakness (uncommon with monitoring, and usually temporary), infection, bleeding, and later spinal deformity in patients who had laminectomy at several levels, which is why laminoplasty is preferred. Dr. Daggubati reviews the specific risks for your situation in person before any decision is made.
Preparing for this surgery
Dr. Daggubati has written detailed guides for this procedure covering medications to stop, prehabilitation, the day of surgery, and a week-by-week recovery timeline.
Common questions
Why don’t I need a fusion?
Because the operation opens the canal from behind without removing the parts of the spine that carry load — the vertebral bodies, discs and facet joints stay intact. Putting the bone back (laminoplasty) restores the anatomy. Instrumentation is added only when a joint or a large amount of bone had to be removed to reach a tumor, which is unusual.
How long is the operation?
Typically three to five hours, most of it spent on the careful microsurgical removal and the watertight closure.
What if the tumor is inside the spinal cord?
Intramedullary tumors are removed through a small midline opening in the cord along the natural plane between tumor and cord. Ependymomas and hemangioblastomas usually come out completely; infiltrative astrocytomas are removed as far as monitoring allows, and radiation may follow. A temporary decline in sensation after intramedullary surgery is expected and generally improves over weeks to months.