A spinal synovial cyst is a fluid-filled outpouching arising from a facet joint that can compress nearby nerve structures. Most occur in the lumbar spine and produce radicular symptoms similar to a disc herniation. Surgical removal addresses the source directly; underlying facet pathology may warrant additional management.
What synovial cysts are
Facet joints have a synovial lining like other joints. With degeneration and instability, the joint capsule can develop an outpouching filled with synovial fluid — a synovial cyst. The cyst can extend into the spinal canal where it compresses neural structures.Most occur at L4-L5, the most mobile and most arthritis-prone lumbar level. Cervical synovial cysts also occur but are less common. The cyst typically associates with facet arthritis at the same level.
Clinical presentation
The symptoms depend on what’s being compressed. A cyst pressing on a nerve root produces radicular pain in that nerve’s distribution. A larger cyst can produce neurogenic claudication if it sufficiently narrows the canal.MRI shows the cyst clearly — typically a well-circumscribed fluid-filled structure adjacent to a facet joint. Distinguishing from a disc herniation or other compression source is usually straightforward on imaging.
Treatment options
Facet injection sometimes ruptures the cyst and provides symptom relief — at least temporarily. The cyst may re-form. For persistent symptoms, surgical removal addresses the source directly.Endoscopic removal of the cyst is possible through a small portal, removing the cyst wall and decompressing the affected nerve. Recurrence is uncommon when the cyst is fully removed. Procedure is outpatient with same-day discharge.
Send your MRI for a free review
Dr. McMillan reviews each scan personally. You get a candid answer about candidacy before any travel or scheduling.
How a typical patient pathway unfolds
Most patients arrive at Synergy having already seen one or more surgeons elsewhere. The pathway here is built around that reality: a careful second read of the existing imaging, a candid conversation about what is and is not warranted, and — when intervention does make sense — a procedure that is as small as the pathology allows.
The starting point is usually the free MRI review. You upload or mail your existing scan; Dr. McMillan reviews it personally and responds with a candid assessment. If the review suggests you are a candidate for the endoscopic approach, the next step is a $250 consultation (credited toward the procedure if you proceed) to discuss the specifics for your anatomy. If the review suggests you are not a candidate, the response tells you that directly and offers honest guidance about what might serve better.
For patients who decide to move forward, scheduling typically happens within two to three weeks depending on the calendar. The procedure itself is outpatient — most patients arrive in the morning, go home the same day, and are walking with a small dressing covering the incision. Routine follow-up visits over the recovery window are part of the procedure bundle, and the office coordinates with your local providers as needed. Out-of-town patients are accommodated as a routine matter; we see patients from across South Carolina, Georgia, North Carolina, Tennessee, and beyond.
When fusion enters the conversation
Synovial cysts often associate with significant facet arthritis and sometimes with instability at the level. When the underlying facet joint is markedly degenerated or unstable, fusion may be considered along with cyst removal. For most isolated synovial cysts without significant instability, removal alone is sufficient.Bottom line
A spinal synovial cyst is a fluid-filled outpouching arising from a facet joint that can compress nearby nerve structures. Most occur in the lumbar spine and produce radicular symptoms similar to a disc herniation. Surgical removal addresses the source directly; underlying facet pathology may warrant additional management.
If you’ve been told you need a fusion — or you’re trying to avoid one — a free MRI review is the most useful next step. Dr. McMillan reviews each scan personally and tells you candidly whether the endoscopic approach fits your specific anatomy.
For patients dealing with spinal synovial cyst, the conversation comes down to specifics: what your imaging actually shows, what your symptoms are actually telling us, and which procedure (if any) genuinely matches that pattern. The candid answer is sometimes that you do not need surgery yet; the candid answer is sometimes that you do, but a smaller operation than the one you have been quoted. A second-opinion MRI review separates those cases and gives you the information you need to make the decision well.
The Synergy approach to spinal synovial cyst
Most patients arrive at Synergy Spine Center after being told their only surgical option is fusion. The practice was built on a different premise: when the imaging shows pathology that decompression can address, decompression is what’s recommended — not a fusion that locks the segment permanently. For spinal synovial cyst specifically, the typical pathway begins with a careful second read of your MRI, then a candid conversation about whether endoscopic decompression or endoscopic foraminotomy would address the specific source of symptoms.
Dr. McMillan personally reviews every MRI submitted through the free MRI review portal. The review takes several business days and produces a written assessment of candidacy. If the imaging supports an endoscopic approach, you’ll receive a recommendation for the specific procedure and a transparent quote for the bundled price — surgeon, facility, and anesthesia all in one number. If the imaging shows something that wouldn’t benefit from endoscopic intervention, you’ll be told that directly, often with a referral to the appropriate specialty.
Recovery from endoscopic spine surgery for spinal synovial cyst is meaningfully faster than from open laminectomy or fusion. The incision is less than ⅓ inch, the procedure is outpatient under local anesthesia, and most patients are walking the same afternoon. Office workers typically return within one to two weeks; manual labor takes four to six weeks depending on the level of physical demand. The full pathway is documented at /how-it-works/ and the typical 3-day visit for out-of-town patients is at the 3-day plan. Authoritative background on this condition is also available at NIH NCBI — Spinal Synovial Cyst.
Frequently asked
Will the cyst come back after removal?
Recurrence is uncommon when the cyst is fully removed. The underlying facet pathology continues, so similar problems at other levels remain possible over years. Transparent bundled pricing for the procedure is published openly at /spine-surgery-cost-transparent-pricing/, so you can plan financially before scheduling.
Can injections cure a synovial cyst?
Facet injection sometimes ruptures the cyst with extended symptom relief. The cyst can re-form. Surgical removal is more definitive. Patients who travel for care from out-of-town typically combine consultation and procedure into a single visit — the 3-day plan documents the standard cadence and what to plan for.
How is a synovial cyst different from a disc herniation?
Disc herniations are disc material; synovial cysts are fluid-filled outpouchings from a facet joint. Both can compress nerves. Imaging distinguishes them clearly. Patients who travel for care from out-of-town typically combine consultation and procedure into a single visit — the 3-day plan documents the standard cadence and what to plan for.
Is endoscopic removal possible?
For appropriate cases, yes — through a small portal. The specific approach depends on the cyst location and patient anatomy. If you want the full procedural detail and what to expect during recovery, the endoscopic decompression page walks through technique, anesthesia, and the typical timeline.
Will I need fusion?
Most isolated cysts without significant instability are addressable with removal alone. Fusion may be considered when the underlying facet is markedly degenerated or unstable. To find out whether spinal synovial cyst is treatable through an endoscopic approach in your specific case, submit your imaging through the free MRI review — Dr. McMillan reviews each scan personally and provides a candid candidacy assessment.
What's the recovery time?
Same-day discharge typical. Nerve recovery proceeds over days as the previously compressed root settles. Patients who travel for care from out-of-town typically combine consultation and procedure into a single visit — the 3-day plan documents the standard cadence and what to plan for.
How this page was prepared
This page summarizes the clinical approach taken at Synergy Spine Center for the topic above. It is based on peer-reviewed literature, professional society guidelines (NASS, AAOS), federal patient education resources (NIH, AHRQ, CMS), and Dr. McMillan’s experience as Director of Spinal Medicine and Endoscopic Spinal Surgery. Outcome language is qualified. Individual results vary. Pricing where shown is current for 2026 and may change.
References
- PubMed — synovial cyst spine literature. — source
- OrthoInfo — spinal cysts. — source
- NASS — synovial cyst resources. — source
- NIH NCBI — Spinal Synovial Cyst — clinical reference on spinal synovial cyst.
- Cleveland Clinic — Spinal Synovial Cyst — clinical reference on spinal synovial cyst.
Synergy Spine Center publishes patient education content for general information only; it is not medical advice and does not establish a physician-patient relationship. For specific medical guidance, schedule a consultation. No identifiable patient information is included on this page.