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Ch 10 Path./Modality

Lumbar, Sacrum, and Coccyx pathology

QuestionAnswer
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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