Among these 25 cases of CSM we found disc herniation in 23 cases, posterior osteophytes in 9 cases, facet joint arthropathy in 5 cases, coexistent OPLL
in 1 case, ligamentum flavum hypertrophy in 6 cases and spondylolisthesis in 2 cases.
Cervical magnetic resonance imaging (MRI) showed spinal stenosis at C4-5 due to ossification of the posterior longitudinal ligament (OPLL
) and a signal intensity change of the interverbral disc of C5-6 (Figure 4).
Hardening or ossification of posterior longitudinal ligament (OPLL
) occurs to prevent the spreading of infection to the spinal cord.
Hence, the finding that PD among patients with thoracic OPLL
has a lower likelihood of CSFL than AD and CD seems justifiable,[sup] since no dissection of the adhesion is involved in PD.
Several lines of evidence suggest that genetic factors are likely to contribute to the etiology of OPLL
. (6-8) In fact, genetic studies including affected sib-pair linkage studies and candidate-gene association studies have shown a number of genes/loci that link to OPLL
Type Vertebra Disease Number Cadavers Lumbar Normal spine 22 Osteophyte formation 50 Normal spine 23 Disc degeneration 4 Disc height reduction 6 Disc herniation 6 Cervical Endplate sclerosis 6 OPLL
23 Ossification 16 Osteophyte 10 Patients Thoracic Compression fracture 16 Compression fracture 32 Disc degeneration 20 Disc height reduction 15 Disc herniation 17 Lumbar Endplate sclerosis 11 Facet joint degenerative 12 LDK 20 Osteophyte 25 Osteoporosis 20 Spondylolisthesis 16 FIGURE 1: Status of an aged society and spinal surgeries in Korea.
Quad-band VCO for GSM OPLL
Transmitters, LMX2614 Data Sheet, National Semiconductor Corp., Santa Clara, CA.
In our patient, bilateral facetectomy was unavoidable to completely remove the OYL lesion at L3/4; the OPLL
at L4/5 was left untouched.
In many cases, when stenotic pathology cannot be found at the disk level alone, or is accompanied by ossification of posterior longitudinal ligament (OPLL
), a posterior strategy can provide satisfactory cord decompression.
A third type of transmit design is called translational loop or offset phase-locked loop (OPLL
A 70-year-old female patient with cervical myelopathy presented at and was admitted to our hospital with aggravated quadriplegia due to ossification of posterior longitudinal ligament (OPLL