"Degenerative lumbar spondylolisthesis with spinal stenosis.
Spinal stenosis or degenerative spondylolisthesis are back conditions that are caused by the narrowing of the spinal canal.
Spinal stenosis is commonly seen with degenerative ..
Degeneration of the intervertebral disk has secondary effects on the adjacent vertebral end platesand bone marrow. As discussed earlier in the section on pathophysiology, fissures develop in thecartilaginous end plates in concert with disk degeneration. Vascular granulation tissue grows intothe fissures and induces an edematous reaction and vascular congestion in the adjacent bone marrow. Modic's group has classified the bone marrow changes according to the signal intensity on MRimages. This first reaction of bone marrow edema and vascular congestion, called Type 1 change,is hypointense on T1 and hyperintense on T2-weighted images. Type 1 change routinely enhanceswith gadolinium and can simulate osteomyelitis. With time, the bone marrow converts to apredominantly fatty marrow (Type 2 change). Longitudinal studies have shown this fatty marrowreplacement to be stable over a 2-3 year period. Type 2 change is hyperintense on T1 and isointenseto hypointense on T2-weighted images, the exact signal intensity dependent on the degree of T2-weighting. Chronic disk disease leads to dense sclerosis of the vertebral end plates and adjacentvertebral bodies (Type 3 change). Conversion from Type 1 to Type 3 change generally requires a fewyears time. Type 3 change is reflected on the MR images as hypointensity on both T1 and T2-weighted images.
A fracture is a break or crack in a bone, usually caused by a traumatic event such as a car crash, fall, sports injury or violent act. Fractures in the spine affect the vertebrae, and can occur in the upper (cervical), middle (thoracic) or lower (lumbar) back. Patients with osteoporosis, tumors or other conditions prone to weakened bones may be at a higher risk of experiencing a spinal fracture.
Degenerative spondylolisthesis and spinal stenosis ..
Symptomatic thoracic disks are uncommon, accounting for about 1% of alldisk herniations. The rib cage, small intervertebral disks, and coronalorientation of the facets joints all contribute to limited mobility of thethoracic spine, and consequently, a lower risk of disk herniation. The mostcommon level is T11-T12, where the spine is relatively less rigid. SagittalT2-weighted FSE sequences are excellent for displaying indentation of ventralthecal sac and impingement of the spinal cord by thoracic disks. Axial imageshelp delineate lateralization to either side. Disk morphology is similarto the cervical region. Calcification is more common in thoracic disk fragmentsand parent disks than in cervical or lumbar region.
Degeneration of the intervertebral disk is accompanied by loss of water content and thereforesignal intensity on MR images. Loss of disk signal is not a necessary prerequisite for disk herniation. On T1 images a herniated disk generally has the same signal characteristics as the parent disk and isseen as an extrusion of disk material into the spinal canal. Herniated disks can be midline or lateral,and it is important to clearly identify the location of the disk fragment for surgical planning. Midlineextradural lesions can be identified on sagittal views by effacement of the thecal sac or cord, but wheneccentric they may be seen better on the axial views. Normal signal intensity in the neural foraminamay be diminished due to displacement of either epidural veins or foraminal fat.
lumbar laminectomy for degenerative spinal stenosis: ..
Paget's disease: also known as osteitis deformans, a bone disease in which normal bone is destroyed and then replaced with thickened, weaker, softer bone. This weaker bone easily bends and deforms. Most often effects the pelvis, thoracic and lumbar spine, skull, femur, tibia, fibula, and clavicles.
Spondylolisthesis is a condition of spinal instability, in which one vertebra slips forward over the vertebra below; isthmic spondylolisthesis, the most common form, is caused by a bony defect (or fracture) in an area of the pars interarticularis, located in the roof (laminae) of the vertebral structure. Treatment options for isthmic spondylolisthesis may be non-surgical
The most common spondylolisthesis occurs with slipping of L4 on L5.
Lumbar Spondylolisthesis - North American Spine Society
Lumbar Degenerative Disc Disease; Lumbar Spinal Stenosis; Lumbar Spondylolisthesis; ..
Explaining Spinal Disorders: Degenerative Spondylolisthesis
Spondylolisthesis - Degenerative Spinal Condition
Lumbar Stenosis and Degenerative Spondylolisthesis - …
The management of spinal stenosis and spondylolisthesis has evolved over the years
Lumbar Stenosis and Degenerative Spondylolisthesis | …
The neural foramina are visualized on parasagittal images of the lumbar spine, and disk herniationcan be detected by obliteration of foraminal fat. Nevertheless, axial MR is better for visualizinglateral disk herniations. Lateral disks compress the nerve root within the foramen or just beyond itslateral margin distal to the nerve root sheath.
Degenerative Spondylolisthesis | Clinical Gate
Spondylolisthesis is a spinal condition in which one vertebra slips forward over the vertebra below, leading to back pain and other symptoms; degenerative spondylolisthesis usually occurs in the lumbar spine, especially at the 4th and 5th lumbar vertebrae (L4 and L5). Treatment options for degenerative spondylolisthesis may be non-surgical for lesser cases, and the more
Degenerative Spondylolisthesis - Spine - Orthobullets
Marginal osteophytes form around the periphery of the vertebral body end plates of the lumbarspine. The larger ones generally project anteriorly or directly lateral and do not compress neuralstructures. Posterior and posterolateral osteophytes are more likely to cause problems.
of spondylolisthesis, spinal stenosis, ..
For Spondylolisthesis and Treatment: Spondylolisthesis is a spinal condition when one vertebra slips forward over another vertebra. Depending upon where in the spine the slip occurs, the type of condition can be considered or , discussed in more detail on their respective pages. These slips are all classified using the Meyerding Grading System, based on the percentage that one vertebral body has slipped forward over the vertebral body below: a Grade I slip is considered the most mild, and a Grade V slip represents the vertebral body above completely slipping off the body below (called spondyloptosis).
DEGENERATIVE STENOSIS OF THE LUMBAR SPINE - …
Interspinous process distraction: A spacer device is inserted between the spinous processes â the bony protrusions along the back of the lumbar spine. Once in place, the spacer lifts and opens the spinal canal as if one were in a seated position rather than a standing position, effectively relieving the pressure on the spinal nerves. The spacer device is not attached to bone or ligament and does not result in spinal fusion. The surgery is minimally invasive and can be done under local anesthetic. Because interspinous process distractors are relatively new compared to a laminectomy, the long-term effectiveness is not known. Also, not all insurance companies will pay for this technology and out-of-pocket expenses may be incurred.
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