Sciatica of nondisc origin and piriformis syndrome: diagnosis by magnetic resonance neurography and interventional magnetic resonance imaging with outcome study of resulting treatment.

@article{Filler2005SciaticaON,
  title={Sciatica of nondisc origin and piriformis syndrome: diagnosis by magnetic resonance neurography and interventional magnetic resonance imaging with outcome study of resulting treatment.},
  author={Aaron G. Filler and J Haynes and Sheldon E. Jordan and Joshua P. Prager and J. Pablo Villablanca and Keyvan Farahani and Duncan Q. McBride and Jay S. Tsuruda and Brannon Morisoli and Ulrich Batzdorf and J Patrick Johnson},
  journal={Journal of neurosurgery. Spine},
  year={2005},
  volume={2 2},
  pages={
          99-115
        }
}
OBJECT Because lumbar magnetic resonance (MR) imaging fails to identify a treatable cause of chronic sciatica in nearly 1 million patients annually, the authors conducted MR neurography and interventional MR imaging in 239 consecutive patients with sciatica in whom standard diagnosis and treatment failed to effect improvement. METHODS After performing MR neurography and interventional MR imaging, the final rediagnoses included the following: piriformis syndrome (67.8%), distal foraminal nerve… 
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References

SHOWING 1-10 OF 74 REFERENCES
The value of MR neurography for evaluating extraspinal neuropathic leg pain: a pictorial essay.
TLDR
MR neurography showed a causal abnormality accounting for the clinical findings in all 15 cases of neuropathic leg pain referable to the lumbosacral plexus or sciatic nerve, and Detected anatomic abnormalities included fibrous entrapment, muscular ent Trapment, vascular compression, posttraumatic injury, ischemic neuropathy, neoplastic infiltration, granulomatous infiltration, neural sheath tumor, postradiation scar tissue, and hypertrophic neuropathy.
Magnetic resonance neurography studies of the median nerve before and after carpal tunnel decompression.
TLDR
It is suggested that MR neurography is an effective means of both confirming compression of the median nerve and its successful surgical decompression in patients with carpal tunnel syndrome.
CT-guided injection of botulinic toxin for percutaneous therapy of piriformis muscle syndrome with preliminary MRI results about denervative process
TLDR
The CT-guided BTX injection in the PMS is an emergent and feasible technique that obtains an excellent local therapeutic effect without risk of imprecise inoculation.
Carpal tunnel syndrome: correlation of magnetic resonance imaging, clinical, electrodiagnostic, and intraoperative findings.
TLDR
MRI is a sensitive diagnostic modality that can demonstrate signal and configurational abnormalities of the median nerve in patients diagnosed with carpal tunnel syndrome.
Ulnar nerve entrapment at the elbow: correlation of magnetic resonance imaging, clinical, electrodiagnostic, and intraoperative findings.
TLDR
MRI was both sensitive and specific in diagnosing ulnar nerve entrapment at the elbow as defined by clinical, electrodiagnostic, and operative findings.
Annular tears and disk herniation: prevalence and contrast enhancement on MR images in the absence of low back pain or sciatica.
TLDR
Annular tears and focal disk protrusions on MR images, with or without contrast enhancement, are frequently found in an asymptomatic population.
Diagnosis and treatment of piriformis syndrome.
Magnetic resonance imaging findings in piriformis syndrome: a case report.
TLDR
A 30-year-old woman, affected by a severe scoliosis, who developed a persistent buttock pain resembling that of PS is reported, which was confirmed by magnetic resonance imaging of the pelvis, which showed an enlargement of the left piriformis muscle with an anterior isplacement of the sciatic nerve.
Magnetic resonance neurography of peripheral nerve following experimental crush injury, and correlation with functional deficit.
TLDR
It is demonstrated that quantitative assessment of nerve signals with MR neurography allows the sequence of events following nerve crush injury to be followed in vivo, and that a return toward a normal signal correlates with functional improvement.
...
...