Diagnosis and microsurgical approach to far-lateral disc herniation in the lumbar spine

1990 ◽  
Vol 72 (3) ◽  
pp. 378-382 ◽  
Author(s):  
Joseph C. Maroon ◽  
Thomas A. Kopitnik ◽  
Larry A. Schulhof ◽  
Adnan Abla ◽  
James E. Wilberger
Keyword(s):  
Facet Joint ◽  
Lumbar Disc ◽  
Spinal Nerve ◽  
Magnetic Resonance Images ◽  
Content Type ◽  
Enhanced Ct ◽  
Disc Herniations ◽  
Microsurgical Approach ◽  
Far Lateral ◽  
Fine Print

✓ Lumbar-disc herniations that occur beneath or far lateral to the intervertebral facet joint are increasingly recognized as a cause of spinal nerve root compression syndromes at the upper lumbar levels. Failure to diagnose and precisely localize these herniations can lead to unsuccessful surgical exploration or exploration of the incorrect interspace. If these herniations are diagnosed, they often cannot be adequately exposed through the typical midline hemilaminectomy approach. Many authors have advocated a partial or complete unilateral facetectomy to expose these herniations, which can lead to vertebral instability or contribute to continued postoperative back pain. The authors present a series of 25 patients who were diagnosed as having far lateral lumbar disc herniations and underwent paramedian microsurgical lumbar-disc excision. Twelve of these were at the L4–5 level, six at the L5–S1 level, and seven at the L3–4 level. In these cases, myelography is uniformly normal and high-quality magnetic resonance images may not be helpful. High-resolution computerized tomography (CT) appears to be the best study, but even this may be negative unless enhanced by performing CT-discography. Discography with enhanced CT is ideally suited to precisely diagnose and localize these far-lateral herniations. The paramedian muscle splitting microsurgical approach was found to be the most direct and favorable anatomical route to herniations lateral to the neural foramen. With this approach, there is no facet destruction and postoperative pain is minimal. Patients were typically discharged on the 3rd or 4th postoperative day. The clinical and radiographic characteristics of far-lateral lumbar-disc herniations are reviewed and the paramedian microsurgical approach is discussed.

Microsurgical infrapedicular paramedian approach for retrovertebral lumbar disc herniations

2005 ◽  
Vol 2 (1) ◽  
pp. 88-91 ◽  
Author(s):  
Nedal Hejazi
Keyword(s):  
Facet Joint ◽  
Lumbar Disc ◽  
Clinical Results ◽  
Term Outcome ◽  
Long Term Outcome ◽  
Content Type ◽  
Clinical Benefits ◽  
Disc Herniations ◽  
Fine Print

✓ The author performed a microsurgical infrapedicular paramedian approach in 35 patients (23 men and 12 women) to remove herniated lumbar retrovertebral discs that did not have an apparent origin at either the superior or inferior disc level. The goal of this surgery was to minimize the bone resection, preserve the facet joint, and avoid the risk of secondary vertebral instability. The Macnab outcome classification was used to assess all patients who attended follow-up examination for at least 15 months. The clinical results were excellent or good in 34 (97%) of 35 cases. This minimally invasive lumbar spine technique resulted in minimal morbidity, excellent clinical benefits, and a long-term outcome without evidence of secondary segmental instability.

Evaluation of varied surgical approaches used in the management of 170 far-lateral lumbar disc herniations: indications and results

1995 ◽  
Vol 83 (4) ◽  
pp. 648-656 ◽  
Author(s):  
Nancy E. Epstein
Keyword(s):  
Lumbar Disc ◽  
Degenerative Spondylolisthesis ◽  
Lateral Compartment ◽  
Surgical Approaches ◽  
Content Type ◽  
Direct Exposure ◽  
Disc Herniations ◽  
Complicating Factors ◽  
Far Lateral ◽  
Fine Print

✓ This study was undertaken to determine and compare indications and relative benefits of various surgical approaches in 170 patients (average age 55 years) with far-lateral herniated lumbar discs, identified by magnetic resonance (MR) imaging and computerized tomography (CT) and operated on between 1984 and 1994. Essentially three surgical procedures were performed: complete facetectomy in 73 patients, laminotomy with medial facetectomy in 39 patients, and intertransverse discectomy (also known as ITT) in 58 patients. Follow-up periods averaged 5 years (range 0.5–10 years). Outcomes were scored as excellent (no deficit), good (mild radiculopathy), fair (moderate radiculopathy), and poor (unchanged or worse). Overall, excellent and good results were achieved in 73 and 51 patients, respectively, and fair and poor results in 26 and 20, respectively. There was little difference among the results encountered for the three major surgical groups: 79% of the intertransverse (ITT) group had good-to-excellent outcomes, as compared with 70% of the facetectomy group, and 68% of the group who underwent at minimum laminotomy, and additional hemilaminectomy or laminectomy with medial facetectomy. Results were the same for the 121 patients followed for more than 2 years and for the 49 patients studied for under 2 years. In the management of far-lateral discs, total facetectomy provides the best exposure, but increases the risk of instability. Laminotomy and medial facetectomy uncover the lateral and subarticular recess and preserve stability, but visualization of the far-lateral compartment is often inadequate. The intertransverse approach offers extensive far-lateral but not medial intraforaminal exposure, while also preserving stability. Full facetectomy, laminotomy with medial facetectomy, and the intertransverse approaches yielded nearly comparable outcomes in far-lateral disc surgery. Only the full facetectomy exposes the entire course of the nerve root both medially and laterally, whereas the intertransverse procedure provides direct exposure of the far-lateral compartment alone. It is important to select the correct approach or combination of approaches to address attendant complicating factors such as spinal stenosis, spondyloarthrosis, and degenerative spondylolisthesis identified on CT and MR studies.

Transforaminal percutaneous endoscopic discectomy in the treatment of far-lateral and foraminal lumbar disc herniations

2001 ◽  
Vol 94 (2) ◽  
pp. 216-220 ◽  
Author(s):  
Sean M. Lew ◽  
Thomas F. Mehalic ◽  
Kristin L. Fagone
Keyword(s):  
Return To Work ◽  
Lumbar Disc ◽  
Intervertebral Discs ◽  
Work Status ◽  
Outpatient Basis ◽  
Content Type ◽  
Endoscopic Discectomy ◽  
Disc Herniations ◽  
Far Lateral ◽  
Fine Print

Object. Far-lateral (extraforaminal) and foraminal disc herniations comprise up to 11% of all herniated intervertebral discs. Operative management can be technically difficult, and the optimum surgical treatment remains controversial. Accessing these lateral disc herniations endoscopically via a percutaneous transforaminal approach offers several theoretical advantages over the more traditional procedures. The object of this study was to assess the safety and efficacy of treating patients with far-lateral and foraminal disc herniations via a percutaneous transforaminal endoscopic approach. Methods. A retrospective analysis was performed of 47 consecutive patients who underwent surgery via this approach. All procedures were performed after induction of a local anesthetic on an outpatient basis. Outcome was measured with Macnab criteria and by determining a patient's return-to-work status. The median follow-up period was 18 months (range 4–51 months). Excellent or good outcome was obtained in 40 (85%) of 47 patients. Of the 38 patients working before the onset of symptoms, 34 (90%) returned to work. Five patients (11%) experienced poor outcomes and subsequently underwent open procedures at the same level. Of the 10 recipients of Workers' Compensation, Macnab criteria indicated a significantly worse outcome (70% excellent or good), but an excellent return-to-work status was maintained (90%). There were no complications. Conclusions. Transforaminal percutaneous endoscopic discectomy is safe and efficacious in the treatment of far-lateral and foraminal disc herniations.

Long-term follow up of patients surgically treated by the far-lateral approach for foraminal and extraforaminal lumbar disc herniations

1999 ◽  
Vol 90 (1) ◽  
pp. 59-66 ◽  
Author(s):  
François Porchet ◽  
Anne Chollet-Bornand ◽  
Nicolas de Tribolet
Keyword(s):  
Lumbar Disc ◽  
Lateral Approach ◽  
Spinal Instability ◽  
Content Type ◽  
Far Lateral Approach ◽  
Disc Herniations ◽  
Far Lateral ◽  
Fine Print

Object. This study was undertaken to evaluate the long-term benefit in 202 patients who were surgically treated via a microsurgical far-lateral approach for foraminal or extraforaminal lumbar disc herniations. Methods. All patients underwent surgery at the authors' institute since 1987 and represented 6.5% of all lumbar spinal disc surgeries. There were 67 women and 135 men who ranged in age from 19 to 78 years (mean age 58 years). All patients had unilateral leg pain due to lumbar disc herniations into or lateral to the lateral interpedicular compartment. One patient underwent surgery at the L1–2 level, nine at L2–3, 48 at L3–4, 86 at L4–5, and 58 at the L5—S1 level. The mean follow-up period was 50 months (range 12–120 months). Outcome was defined as excellent (no pain), good (some back pain), fair (moderate radiculopathy), and poor (unchanged or worse) based on Macnab classification. Overall, excellent and good results were achieved in 62 (31%) and 85 (42%) patients, respectively, and fair and poor results in 40 (20%) and 15 (7%) patients, respectively. Of 11 recurrent disc herniations, four presented in an extreme-lateral position, five in a paramedian location, and two on the contralateral side. There were three minor complications related to surgery, seven general complications, and no case of spinal instability. Conclusions. The far-lateral approach is a safe, effective procedure that avoids the risk of secondary spinal instability.

A posterolateral microsurgical approach to extreme-lateral lumbar disc herniation

1995 ◽  
Vol 83 (4) ◽  
pp. 636-640 ◽  
Author(s):  
Michael F. O'Brien ◽  
David Peterson ◽  
H. Alan Crockard
Keyword(s):  
Posterior Approach ◽  
Lumbar Disc ◽  
Posterolateral Approach ◽  
Anatomical Landmarks ◽  
Lumbar Spinal Fusion ◽  
Bone Resection ◽  
Content Type ◽  
Disc Herniations ◽  
Microsurgical Approach ◽  
Lumbar Spinal

✓ Extreme-lateral lumbar disc herniations present a surgical challenge because the conventional posterior approach requires bone resection for complete visualization of the pathology. The authors have identified constant anatomical landmarks in cadaveric dissections that facilitate access to the intervertebral foramen when combined with a posterolateral approach, as described by Watkins, for lumbar spinal fusion. The authors describe a technique that allows rapid localization and safe excision of these extreme-lateral lumbar disc herniations without the need for bone resection.

Extraforaminal lumbar disc herniations: microsurgical anatomy and surgical approach

2002 ◽  
Vol 96 (2) ◽  
pp. 206-211 ◽  
Author(s):  
Rajaraman Viswanathan ◽  
Narayana K. Swamy ◽  
William D. Tobler ◽  
Alson L. Greiner ◽  
Jeffrey T. Keller ◽  
...  
Keyword(s):  
Nerve Root ◽  
Lumbar Disc ◽  
Lateral Compartment ◽  
Nerve Trunk ◽  
Clinical Impression ◽  
Microsurgical Anatomy ◽  
Lumbar Artery ◽  
Content Type ◽  
Far Lateral ◽  
Fine Print

Object. Familiarity with the microsurgical anatomy of the far-lateral compartment is essential for operating in patients with far-lateral discs. In this report the authors address the microsurgical anatomy studied in 24 extraforaminal lumbar disc spaces in three cadavers. Methods. Cadaveric dissections confirmed the authors' operative experience in which they found an arterial arcade to be associated with the nerve trunk. The main trunk of the lumbar artery was located lateral to the exiting nerve root in the region of intervertebral foramen. The trunk of the lumbar spinal nerve descending from the level above was 7 mm (± 3 mm [standard deviation]) lateral to the lumbar artery. Conclusions. Clarification of the microsurgical anatomy of the far-lateral compartment confirmed the authors' clinical impression that the optimum approach to far-lateral discs is via the inferomedial quadrant of the extraforaminal compartment. In this quadrant, exposure of the main nerve root can be facilitated by dividing the posterior primary ramus and a newly described arterial arcade that envelops the nerve trunk. Once this arcade is divided, the nerve can be retracted with relative ease and safety, and the disc can be removed more easily.

Percutaneous endoscopic discectomy: surgical technique and preliminary results compared to microsurgical discectomy

1993 ◽  
Vol 78 (2) ◽  
pp. 216-225 ◽  
Author(s):  
H. Michael Mayer ◽  
Mario Brock
Keyword(s):  
Low Back Pain ◽  
Back Pain ◽  
Lumbar Disc ◽  
Motor Deficits ◽  
Low Back ◽  
Content Type ◽  
Sensory Deficits ◽  
Endoscopic Discectomy ◽  
Disc Herniations ◽  
Fine Print

✓ Percutaneous endoscopic discectomy is a new technique for removing “contained” lumbar disc herniations (those in which the outer border of the anulus fibrosus is intact) and small “noncontained” lumbar disc herniations (those at the level of the disc space and occupying less than one-third of the sagittal diameter of the spinal canal) through a posterolateral approach with the aid of specially developed instruments. The technique combines rigid straight, angled, and flexible forceps with automated high-power suction shaver and cutter systems. Access can thus be gained to the dorsal parts of the intervertebral space where the disc herniation is located. Percutaneous endoscopic discectomy is monitored using an endoscope angled to 70° coupled with a television and video unit and is performed with the patient under local anesthesia and an anesthesiologist available if needed. Its indication is restricted to discogenic root compression with a minor neurological deficit. Two groups of patients with contained or small noncontained disc herniations were treated by either percutaneous endoscopic discectomy (20 cases) or microdiscectomy (20 cases). Both groups were investigated in a prospective randomized study in order to compare the efficacy of the two methods. The disc herniations were located at L2–3 (one patient), L3–4 (two patients), or L4–5 (37 patients). There were no significant differences between the two groups concerning age and sex distribution, preoperative evolution of complaints, prior conservative therapy, patient's occupation, preoperative disability, and clinical symptomatology. Two years after percutaneous endoscopic discectomy, sciatica had disappeared in 80% (16 of 20 patients), low-back pain in 47% (nine of 19 patients), sensory deficits in 92.3% (12 of 13 patients), and motor deficits in the one patient affected. Two years after microdiscectomy, sciatica had disappeared in 65% (13 of 20 patients), low-back pain in 25% (five of 20 patients), sensory deficits in 68.8% (11 of 16 patients), and motor deficits in all patients so affected. Only 72.2% of the patients in the microdiscectomy group had returned to their previous occupation versus 95% in the percutaneous endoscopic discectomy group. Percutaneous endoscopic discectomy appears to offer an alternative to microdiscectomy for patients with “contained” and small subligamentous lumbar disc herniations.

Lumbar phlebography in the diagnosis of disc herniations

1978 ◽  
Vol 49 (4) ◽  
pp. 544-550 ◽  
Author(s):  
Jean Roland ◽  
Jacques Treil ◽  
Dominique Larde ◽  
Luc Picard ◽  
Claude Manelfe
Keyword(s):  
Lumbar Disc ◽  
Water Soluble ◽  
Radiological Anatomy ◽  
Content Type ◽  
Disc Herniations ◽  
Fine Print

✓ The authors report their experience with 240 cases with lumbar phlebography in the diagnosis of lumbar disc herniations. The normal radiological anatomy and the radiological signs of disc herniations are described. Indications for phlebography are given, and the reliability of this test is compared with that of myelography performed with water-soluble agents.

A neurosurgical approach to far-lateral disc herniation

1990 ◽  
Vol 72 (1) ◽  
pp. 143-144 ◽  
Author(s):  
John A. Jane ◽  
Charles S. Haworth ◽  
William C. Broaddus ◽  
Joung H. Lee ◽  
Jacek Malik
Keyword(s):  
Intervertebral Disc ◽  
Disc Herniation ◽  
Simple Modification ◽  
Content Type ◽  
Disc Herniations ◽  
Far Lateral ◽  
Lateral Disc Herniation ◽  
Fine Print

✓ A technique for exposing far-lateral intervertebral disc herniations without disrupting the facet is described. This technique is a simple modification of the standard neurosurgical approach.

Extreme-lateral lumbar disc herniations

1974 ◽  
Vol 41 (2) ◽  
pp. 229-234 ◽  
Author(s):  
A. F. Abdullah ◽  
Edward W. Ditto ◽  
Edward B. Byrd ◽  
Ralph Williams
Keyword(s):  
Back Pain ◽  
Clinical Picture ◽  
Lumbar Disc ◽  
Clinical Syndrome ◽  
Leg Pain ◽  
Sensory Loss ◽  
Lateral Bending ◽  
Content Type ◽  
Disc Herniations ◽  
Fine Print

✓ The authors believe that posterior lumbar disc herniations that occur far laterally (beneath, or beyond the facet) present a clinical picture and special problems of diagnosis different from those encountered with the usual herniations within the spinal canal. In a series of 204 consecutive disc operations, there were 24 “extreme-lateral” disc herniations at the second, third, or fourth lumbar interspace, none at the lumbosacral joint. When compared with the incidence of posterior herniations above the fourth interspace, it appeared that “extreme-lateral” herniations were responsible for the majority of second, third and fourth lumbar root compressions. The clinical syndrome is characterized by anterior thigh and leg pain, absent knee jerk, and sensory loss in the appropriate dermatome but also by the absence of back pain, typical back signs, or positive Lasegue's sign. Reproduction of pain and paresthesia by lateral bending to the side of the lesion is a reliable diagnostic sign. The authors report that myelography fails to disclose these lesions, while discography often proves helpful.

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