Lumbar Spine Issues: Addressing Nerve Compression and Surgical Options - Neurosurgery

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Questions regarding adjacent segments of the lumbar spine?


Hello, Doctor: I have the following questions that I hope you can clarify: The patient is a 59-year-old female who underwent successful lumbar spine surgery at the L5 and S1 levels in 2012 (with interbody fusion and screws).
Starting in 2020, she began experiencing pain in her buttocks (which also hurts when walking) and pain on the outer side of her right calf when getting up from lying down.
Initially, there was a suspicion of piriformis syndrome, and after receiving a corticosteroid injection, she experienced relief for a few days, but the effect wore off.
Subsequent X-rays and MRI revealed that the L4 vertebra was compressing the nerve (the doctor indicated it was adjacent segment compression), and she met the criteria for surgery.
The doctor plans to perform surgery to place an interbody spacer and also to insert a spring to distribute pressure and prevent adjacent segment issues from recurring.
The questions are as follows: Q1: Is it indeed a lumbar compression issue? Other doctors have indicated that the symptoms are atypical for compression pain (typically radiating from the buttocks to the leg; in this case, it radiates from the buttocks to the calf).
Q2: If a spring is placed during surgery, could it potentially increase the load on the bones? What are the pros and cons of preventing adjacent segment issues versus the increased load on the bones?

Justin, 30~39 year old female. Ask Date: 2020/06/30

Dr. Lai Zhaokang reply Neurosurgery


Hello: 1.
It is important to determine if the compressed nerve root corresponds to the patient's symptoms.
Generally, compression at the L4-5 segment affects the L5 nerve root, which typically presents as pain radiating from the buttock down to the lateral aspect of the calf.
2.
Your doctor should have recommended placing a spacer (interbody fusion device) and bone screws at the L4-5 level, with a spring placed at the L3-4 level to act as a shock absorber.
3.
There are currently several materials available for springs: titanium alloy, high molecular plastic, and silicone.
Each manufacturer has its own design features.
The differences in materials and designs also lead to variations in implantation techniques, which may differ among surgeons in different hospitals.
Due to space limitations, I cannot provide a detailed explanation.
If you are interested, please come to my clinic for a face-to-face consultation.
You can compare options from different providers, and it ultimately depends on the mutual trust between you and your surgeon.
4.
If your budget allows, you may consider adding more springs.
Wishing you the best, Dr.
Lai Chao-Kang, Chief of Spine Neurosurgery, Changhua Hospital.

Reply Date: 2020/06/30

More Info


Understanding lumbar spine issues, particularly those involving nerve compression and surgical options, is crucial for effective management and recovery. In your case, the history of previous lumbar surgery and the recent onset of symptoms suggest a complex interplay of factors that need careful evaluation.


Q1: Is it indeed a lumbar compression issue?
Based on your description, the symptoms you are experiencing—pain radiating from the buttocks down to the outer side of the right calf—can indeed be indicative of nerve compression, particularly involving the L4-L5 region. Typically, nerve root compression in this area would present with pain that radiates down the leg, often following a specific nerve distribution pattern. However, the atypical nature of your symptoms, where pain extends to the calf rather than the typical distribution, raises the possibility of other contributing factors.

It is essential to consider that pain can sometimes be referred from other structures, such as muscles or ligaments, rather than solely from nerve compression. The initial suspicion of piriformis syndrome indicates that the pain may also be related to muscle irritation or entrapment rather than direct nerve compression. This highlights the importance of a comprehensive evaluation, including imaging studies and possibly nerve conduction studies, to ascertain the exact cause of your symptoms.


Q2: If surgery involves placing a spring, could it increase the load on the bones?
The decision to place a spring or any type of implant during surgery is typically aimed at providing stability and preventing further degeneration of adjacent segments. However, this does come with potential risks. The introduction of an implant can alter the biomechanics of the spine, potentially increasing stress on adjacent vertebrae. This phenomenon is known as "adjacent segment disease," where the segments adjacent to a surgical site may experience increased wear and tear due to altered load distribution.

The benefits of using a spring or similar device include improved stability and reduced risk of further degeneration at the surgical site. However, the potential downside is that it may lead to increased stress on the adjacent segments, which could predispose them to future issues. The key is to balance these factors, and this is where the expertise of your orthopedic surgeon is invaluable. They can provide insights based on your specific anatomy and the nature of your spinal condition.


Additional Considerations
1. Conservative Management: Before proceeding with surgery, it may be worth exploring conservative management options further. Physical therapy, targeted exercises, and possibly alternative treatments like acupuncture or chiropractic care could provide relief without the need for surgical intervention.

2. Second Opinion: Given the complexity of your case and the atypical nature of your symptoms, seeking a second opinion from another spine specialist could provide additional insights. Different surgeons may have varying approaches to treatment and may offer alternative surgical techniques or conservative management strategies.

3. Post-Surgical Rehabilitation: If surgery is deemed necessary, a well-structured rehabilitation program post-surgery is crucial. This can help in regaining strength, flexibility, and function while minimizing the risk of complications.

4. Monitoring Symptoms: Keep a detailed record of your symptoms, including any changes in pain intensity, location, and any new symptoms that arise. This information can be invaluable for your healthcare team in making informed decisions about your treatment plan.

In conclusion, addressing lumbar spine issues, particularly those involving nerve compression, requires a multifaceted approach. It is essential to work closely with your healthcare team, including orthopedic surgeons and rehabilitation specialists, to determine the best course of action tailored to your specific needs and circumstances.

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