Cervical Foraminotomy

Cervical foraminotomy is a minimally invasive posterior (back of neck) procedure that enlarges the foramen — the bony opening through which a spinal nerve exits the cervical spine — to relieve compression of the nerve root causing arm pain, numbness, and weakness (cervical radiculopathy).

Unlike ACDF (which approaches from the front and fuses the spine) or anterior disc replacement, cervical foraminotomy is performed through a small keyhole incision at the back of the neck and does not require fusion — the treated level retains normal motion. This makes it an attractive option for patients with lateral (side-dominant) disc herniation or foraminal stenosis without significant central disc disease or cord compression.

Cervical foraminotomy is one of the oldest cervical spine procedures and has a long track record of safety and efficacy. With modern minimally invasive endoscopic or tubular retractor techniques, it can be performed through incisions as small as 1 centimetre with minimal muscle disruption and rapid recovery.

When is Cervical Foraminotomy Recommended?

• Lateral cervical disc herniation causing unilateral arm pain and radiculopathy
• Foraminal stenosis from osteophyte (bone spur) narrowing the nerve exit
• Cervical radiculopathy not responding to conservative treatment including physiotherapy and cervical injections
• When fusion is to be avoided — young, active patients or those with single-level lateral disc herniation
• Not suitable when central cord compression is present — ACDF or laminectomy preferred in that setting
• If patient has persisting arm symptoms following an ACDF then occasionally a cervical foraminotomy is required to further decompress the nerve.

What Happens During Cervical Foraminotomy?

The procedure is performed under general anaesthesia with the patient prone (face down) in a head holder. Through a small posterior midline or paramedian incision — as small as 1 cm for endoscopic approaches — a tubular retractor or endoscope is positioned over the affected facet joint at the symptomatic level. Using a high-speed drill under microscopic or endoscopic magnification, the medial aspect of the facet joint is removed, enlarging the foramen and decompressing the compressed nerve root. If a disc fragment is accessible, it can be removed at the same time.

No hardware is implanted and no fusion is typically performed — the procedure is purely decompressive. The incision is closed with dissolvable sutures. The procedure typically takes 45 to 90 minutes, and most patients are discharged the following day.

Endoscopic Cervical Foraminotomy

Using a fully endoscopic technique, cervical foraminotomy can be performed through an incision of approximately 8mm with a tubular working channel. This further minimises muscle disruption, reduces postoperative neck pain, and allows day-case or next-day discharge in appropriate patients.

Hospital Stay

One to two days for the microscopic technique; same-day or next-day for the endoscopic approach.

Activity Guidelines

• Walking — from the day of surgery
• Driving — after 1–2 weeks
• Return to office work — typically 1–2 weeks
• Return to physical work — 3–4 weeks
• Physiotherapy — at 4-week postoperative review
• Running — from 4–6 weeks; contact sports at 3 months

Symptom Improvement

Arm pain typically improves rapidly — often within days of surgery. Numbness and tingling resolve more gradually over weeks to months. Weakness improves over a similar timeframe; longstanding weakness may not fully recover.

Cervical foraminotomy achieves relief of arm pain in approximately 85–90% of appropriately selected patients — comparable to ACDF for lateral disc herniation and foraminal stenosis. The key advantage is preservation of cervical motion and avoidance of fusion. Long-term recurrence of symptoms from the same level is uncommon. Adjacent segment disease is theoretically reduced compared to fusion procedures.

Risks and Complications

• Wound infection — approximately 2-3%
• Nerve root injury — worsening arm pain or weakness; rare
• CSF leak — rare
• Cervical instability — very rare; risk increases if more than 50% of the facet joint is removed
• Recurrent disc herniation — the disc is not fused, so herniation at the treated level can recur