Kyphosis that develops as a complication of prior spine surgery is one of the most underrecognized patterns in spinal deformity. Patients who had successful-seeming procedures — cervical laminectomy, lumbar fusion, scoliosis correction — find themselves years later with a new forward curve, progressive symptoms, and often no clear explanation from their treating physicians about why this is happening or what can be done.
Postoperative kyphosis is not rare. It is a well-described complication of several specific types of spine surgery, each with its own mechanism, timeline, and treatment approach.
Patterns of Postoperative Kyphosis
Cervical Kyphosis After Laminectomy
Cervical laminectomy — removing the bony arches at the back of the cervical spine to decompress the spinal cord — is an effective decompression procedure. But the posterior elements it removes play an important role in maintaining cervical lordosis. When multiple levels are decompressed without fusion, the posterior tension band that keeps the cervical spine in lordosis is disrupted, and the spine can progressively fall into kyphosis over months to years. This is called post-laminectomy kyphosis.
Post-laminectomy cervical kyphosis is particularly common when laminectomy is performed in patients who already had reduced cervical lordosis preoperatively, in younger patients (whose spines are more flexible), or when more than two or three levels are decompressed. It produces progressive neck pain, difficulty looking forward, and — critically — progressive neurological deterioration as the spinal cord drapes over the kyphotic apex and is compressed from the anterior side.
Treatment of established post-laminectomy kyphosis typically requires posterior cervical fusion, often with anterior reconstruction as well if the kyphosis is rigid and the cord requires anterior decompression. This is one of the reasons that cervical laminoplasty — which preserves the posterior tension band — has replaced laminectomy for many multilevel cervical decompression indications.
Proximal Junctional Kyphosis (PJK) After Scoliosis Fusion
Proximal junctional kyphosis is a specific pattern of postoperative kyphosis that develops at the vertebrae immediately above the top of a long spinal fusion. When a long thoracic or lumbar fusion is performed, the rigid, corrected construct creates a mechanical discontinuity where it ends — the transition from the stiff, instrumented segment to the mobile spine above. If this transition is abrupt, the segment above can progressively kink forward, developing a new kyphotic angle at the junctional zone.
PJK is discussed in detail in the context of Scheuermann’s kyphosis surgery, but it occurs after any long posterior spinal fusion — for scoliosis, for flatback correction, for adult deformity. Most PJK is radiographic rather than clinically significant, but symptomatic PJK with neurological compromise or severe progressive deformity may require revision surgery to extend and reinforce the construct at the junctional zone.
Kyphosis at the Lumbosacral Junction After Instrumented Fusion
When lumbar fusion stops above the lumbosacral junction in patients with significant pelvic incidence, the L5–S1 segment must compensate for the rigidity of the fused levels above. Over time, L5–S1 disc degeneration, collapse, or anterior slip at this level can create a kyphotic angle at the lumbosacral junction that offsets the alignment achieved by the fusion above. This is a form of adjacent segment-related postoperative kyphosis that may require fusion extension to the sacrum and pelvis.
How Postoperative Kyphosis Is Recognized
The key to recognizing postoperative kyphosis is comparing serial standing X-rays over time. A single X-ray shows what the alignment is; sequential imaging shows whether it is progressing. Patients who had prior spine surgery and notice progressive difficulty holding their head up, progressive forward lean, increasing neck or back pain, or new neurological symptoms should have standing X-rays and direct comparison with their most recent prior imaging.
MRI is important when neurological symptoms are present, to assess whether the kyphosis is causing cord compression at the apex of the new curve. This is particularly urgent in cervical postoperative kyphosis, where cord compression from a new cervical kyphosis can produce or worsen myelopathy.
Treatment
Treatment of postoperative kyphosis depends on the location, the degree, the rate of progression, and whether neurological compromise is present. Mild, stable, asymptomatic cases may be monitored with periodic imaging. Progressive or symptomatic cases generally require surgical intervention — the specific procedure determined by the anatomy, the prior instrumentation, and the degree of correction required.
For more on how kyphosis correction is approached surgically — including the osteotomy techniques used for rigid postoperative deformity — see the Kyphosis Surgery page and the Flatback Deformity Surgery page.
About Dr. Zeeshan Sardar
Dr. Sardar, MD, MSc, F.R.C.S.C, is Co-Chief of Spinal Deformity Surgery at NewYork-Presbyterian / Columbia University, specializing in kyphosis correction including complex revision cases after prior surgery. To schedule a consultation, call 212-932-5187 or visit the contact page.
This post is for educational purposes only and does not constitute individualized medical advice.