An operation for a single pinched nerve root in the neck. Through a small opening at the back, the roof over the trapped nerve is opened and whatever is pressing on it is removed — the disc stays, nothing is fused, and no implant goes in. It applies when the compression sits out to the side, where the nerve leaves the spine.
A cervical nerve root leaves the spine through a short bony tunnel called the foramen. When a disc bulges into that tunnel from the side, or an arthritic spur grows into it, the root is squeezed against the wall — and the pain, numbness and weakness turn up down the arm rather than in the neck.
A foraminotomy widens the tunnel. Working from behind, a few millimetres of the lamina and the inner edge of the facet joint over the root are removed, and any disc fragment sitting in the tunnel is lifted out. The root is decompressed where it is trapped, and everything that was not the problem is left alone.
That last part is the point. An ACDF reaches the same root from the front by removing the whole disc and fusing the level. A foraminotomy reaches it from behind and leaves the disc, the motion and the alignment as they were.
Foraminal decompression. Posterior oblique view of a cervical level with the medial facet and laminar edge removed over the exiting nerve root, showing the widened foramen and the root freed from the offending disc fragment or osteophyte.
Cervical radiculopathy where the symptoms are in the arm and the compression is lateral. The pattern is usually clear: pain running from the neck into the shoulder blade and down a particular part of the arm, sometimes with numbness in specific fingers, often worse when the head is tilted toward the painful side.
Most cervical radiculopathy settles without surgery. Time, therapy, medication and where appropriate an injection come first; this operation is for the arm pain that does not settle, or for a root under enough pressure that waiting risks the weakness becoming permanent.
The exclusions all come down to the same thing: the foramen is out at the side, so an operation aimed at it does nothing for a problem in the middle, and nothing for a problem with the neck as a structure.
A patient whose main complaint is a painful, stiff neck will not be helped by opening a foramen, because the foramen was not what hurt. Where the cord is compressed rather than a root, the operation needed is laminoplasty or a fusion, and where the level has collapsed and needs its height back, that is an ACDF.
Both operations relieve a compressed cervical root and both work. They differ in what they cost the patient to do it, and in what each can and cannot reach.
Both are operations Dr. Zaidi performs, and ACDF is by some distance the more widely applicable of the two. The case for a foraminotomy is not that it is smaller — it is that for a laterally trapped root it achieves the same relief without fusing a level that did not need fusing. See how the approach is chosen.
Commonly through a tubular retractor, which is the same access principle used for tubular discectomy in the lower back — the muscle is spread rather than stripped, and the corridor is only as wide as the work.
The patient is positioned face down with the head supported. Imaging identifies the exact level before the incision — the target here is a few millimetres across, and being one level off is the classic avoidable error.
A short incision to one side of the midline. Sequential dilators separate the muscle fibres and a tube is docked directly on the junction of lamina and facet over the affected root.
Under magnification, the edge of the lamina and the medial portion of the facet joint are removed to unroof the root. Typically well under half the joint is taken — enough to free the nerve, not enough to loosen the level.
The root is followed out along the foramen. Any disc fragment beneath it is removed and any spur narrowing the tunnel is taken down, until the nerve is loose along its whole course.
The tube is withdrawn and the muscle falls back together. Closure is a few sutures; there is no implant, no graft and no drain in a routine case.
Tubular cervical foraminotomy. Docking the tube on the lamina-facet junction, unroofing the foramen, and the exiting root freed from a disc fragment with the disc space itself untouched.
The disc that was pressing on the nerve is not removed — only the part of it that had escaped into the foramen. That is why the level keeps moving and why nothing has to fuse.
Figures are general ranges from the surgical literature, not guarantees for any individual case. Arm pain is usually the first thing to settle. Numbness and weakness recover more slowly and depend on how long the root was compressed — a nerve that has been squeezed for a long time takes months to recover, and may not recover fully.
Whether a foraminotomy suits you is decided on the MRI — specifically on whether the pressure sits out in the foramen or in the middle of the canal. Bring any imaging you already have.