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Grade I Spondylolisthesis of L5 on S1 2.

Here, we report the first case of this myelopathy at C7/T1, which was successfully treated by surgical decompression.

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How serious is anterolisthesis of C7-T1 by 3 mm ..

The radiological examinations revealed severe C7/T1 facet joint arthrosis with bony spur extending into the spinal canal, which compressed the spinal cord laterally.

A postero-anterior myelogram showed complete block of the contrast medium at C7/T1 (Figure 3 ).

Except for C1/2, C7/T1 shows the smallest range of motion in all directions: flexion/extension is 9°, one side bending 4°, and rotation 2°, which leads to minor spondylotic changes in the intervertebral disc and facet joints at this spinal level [ 18 ].

Grade 1 (3 mm) anterolisthesis of C3 on C4 as well as C4 on C5

As mentioned above, there is small range of motion at C7/T1 and thus, minor spondylotic changes.

The spinal cord swelling was detected at C7/T1, and no evidence of compression of the spinal cord was depicted in the median slice, which might lead to a misdiagnosis of having an intramedullary tumor.

Computed tomographic myelography clearly indicated a spinal cord deformity in an antero-posterior direction and severe arthrosis with bony spur formation from the bilateral C7/T1 facet joints growing into the spinal canal, which was right side dominant (Figure 4 ).

Grade 1 anterolisthesis of C3 on C4 is present

There have been no reports of the percentage of the C7/T1 myelopathy cases amongst all cervical myelopathy, but it would be expected to be very rare.

, Kimmerly anomaly, posticus ponticusCalcific bridge between the lateral mass and posterior tubercleIn 15% of the populationProper testing for VBAI is recommended (George's test, etc.)Approximately 10% of the patients with arcuate foramen demonstrate signs and symptoms

Significance minimal clinical significance or risk –question of vertebral artery occlusion
Agenesis of posterior tubercleNo spinolaminar line on posterior tubercleStress hypertrophyFailure in segmentation

Agenesis of posterior arch of C1
Posterior Arch Maldevelopment at L5Associated with spina bifida oculta
Underdevelopment Neck of Scotty dog extremely thinNo contact sports because could cause fracture
Spondylolitic Spondylolisthesis AnterolisthesisLook at Myerding's scale and Ullman's lineSlippage of the L5 body anterior on sacral baseMost reliable way to make sure this does not change overtime is to use the percentage methodSurgical stabilization could be an option (more than 3mm of translation)Etiology is trauma, congenital, stress fracture (obesity, constant loading), pathology (metastasis), or elongated pars (fracture that healed longer)Stress fracture is the most common etiologyDegenerative is the second most common etiologyAverage age of onset of a stress fracture is 18 months old*3 mm or more of translation in considered unstable*


In the sagittal planes of magnetic resonance imaging (MRI), the spinal cord at C7/T1 showed swelling with a slightly higher signal intensity region on the T2-weighted images in the median slice, although no compressive factors were detected.

and left facet joint fusion with iliac bone graft were added for the spinal stability of C7/T1 [ 17 ].
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  • C-spine x-ray interpretation – Don't Forget the Bubbles

    Nonunion of the T1 spinous process fracture (arrowheads) and slight anterolisthesis of C7/T1 are detected.

  • Spondylolysis and Spondylolisthesis - London Pain Clinic

    On August 7, his spinal cord was decompressed through a hemilaminectomy of C7 and C7/T1 facetectomy in the right side.

  • Herniated Disc Questions and Answers Archive 2010 …

    C7/T1 has a low frequency of the posterolisthesis, posterior spur formation, and intervertebral disc herniation.

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Herniated Disc Questions and Answers Archive 2010 Part 7.

Meyerding classification system is used to determine the degree of anterolisthesis of the 5th lumbar vertebra in relation to the sacrum. The sacral base is divided into 4 equal segments, and the alignment of the posterior surface of the 5th lumbar vertebral body is ascertained. In this method spondylolisthesis can be graded 1 – 4, depending on the amount of anterior shift of L5 in relation to the sacrum.

Spinal Cord Injuries - Spine - Orthobullets

It is important to remember that Lateral Recess Stenosis and Axial Stenosis are related conditions. Lateral Recess Stenosis commonly occurs in the lumbar spine region of the lower back at vertebral levels L4/5 & L5/S1, and in the neck at vertebral levels C5/6 & C6/7. Axial Stenosis however commonly occurs in the lumbar spine region of the lower back at vertebral levels L2/3 & L3/4 and in the neck at vertebral levels C4/5 & C5/6. The significant benefit offered by aware state diagnosis (see below) is that it enables the surgeon to accurately target the problem area and thus deliver specific treatment focused only upon that problem area.

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Bilateral Pars Fracture of L5
Ununited Growth Centers on Tips of T1
Hypoplastic RibUnder developed
Intrathoracic RibComing off vertebral body but not wrapping around thoracic cageActually goes through lung fieldPatient usually does not present
Fused Rib2 rib heads articulating together conjoined rib headMight have problems with chest expansion in that area

C7 Transverse processes go down and out
T1 Transverse processes go up and out
Cervical RibIf it has an accessory articulation then it is known as cervical digitLinked with thoracic cage

Cervicothoracic Transitional SegmentNo joint space hypertrophic transverse process on one sideCervical rib on other side (joint space was visible)

Rib CartilageCostochondral calcificationNo increased serum calcium levelsPhysiological calcification

Hip DJD (young patient)Decreased

Congenital hypoplasia of the acetabulumUnderdevelopment of the acetabulum can cause wear and tear and early DJD

23-year-old female with congenital hip hypoplasia.
Pseudotumor of the PelvisGrowth center and as bone matures it disappearsBilateral and symmetricalOn inferior ramus
Coxa ValgaMeasure femoral neck anglesMore than 130 degreesChildren usually in valgus range

Congenital Hypoplasia of Ischium and PubisUnderdevelopment
Pectus Excavatum (Funnel Chest)Heart displaced to leftThoracic ribs steeper than normalReduced

Sacral AgenesisNo sacrumL5 articulates directly with the ilium
Bipartate Sesamoid2 sesamoid bones on big toeMay be bilateral but will not be symmetrical

Bone projectionMight be confused with osteochondroma (benign tumor)Always on humerus and always points to elbowSingle projection

OsteochodromaConsists of bone and cartilage (mixed density) - benignOn many bonesWhen they are on long bones, they point away from jointDoes not

Madelung DeformityOccurs in wristCarpals are not aligned

PolydactylyMore than normal amount of digitsCan occur with fingers or toes

Apert'sMitten hand glove hand

Malformation of the skull

skull taller than normal and thinner than normal in A P view coronal sutures closed too early

long, narrow "boat head" midsagittal suture does not grow normally

Lumbosacral Transitional Segments


Type Ia single TP that is taller than 19mmType Ib pair of TP's that are both taller than 19mmClinically Significant Transitional Segments:1.

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