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Ch 10 Path./Modality
Lumbar, Sacrum, and Coccyx pathology
| Question | Answer |
|---|---|
| Ankylosing Spondylitis | inflammatory condition beginning in the sacroiliac joints and progresses up the vertebral column, spine may become rigid |
| Compression Fracture | superior and inferior surfaces of the vertebral body are driven together producing a wedge shaped vertebra, rarely causes a neurologic deficit |
| Chance Fracture | results from hyperflexion force that causes a fracture through the vertebral body and posterior elements; patients who wear lap-type seat belts are at risk |
| Herniated Nucleus Pulposus | occurs most frequently at L4-L5, causing sciatica; "slipped disk" |
| Sciatica | irritation of the sciatic nerve that passes down the posterior leg |
| Metastases | malignant neoplasms that spread to distant sites via blood and lymphatics |
| Osteolytic | destructive lesions with irregular margins |
| Osteoblastic | proliferative bony lesions of increased density |
| Spondylolisthesis | forward movement of one vertebra in relation to another, due to a developmental defect in the pars interarticularis; most common at L5-S1 but also accurs at L4-L5; severe cases require a spinal fusion |
| Spondylolysis | dissolution of a vertebra and seperation of the pars interarticularis; on an oblique projection, the Scottie dogs neck appears broken; most common in L4-L5 |
| Which modality is useful for evaluating the vertebral column? | CT |
| CT is useful for detecting... | fractures, disk disease, and neoplastic disease |
| The modality used to evaluate soft tissue structures such as the spinal cord is.. | MRI |
| Nuclear Medicine dectects... | metastases, inflammatory condistions, Pagets disease, neoplastic processes, and osteomyelitis |
| What is Bone Densitometry? | noninvasive measurement of bone mass; lumbar spine is often assessed |
| Difference between Bone Densitometry and Conventional radiography. | Bone Densitometry is accurate to within 1% and very low radiation skin dose. Conventional doesn't detect loss of bone until bone mass has been reduced by 30%. |
| What is Myelography? | injection of contrast medium into the subarachnoid space to visualize soft tissue structures of the spinal canal |
| What other modalities have reduced the use of Myelograms? | CT and MRI |
Created by:
freebird
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