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12 Cards in this Set
- Front
- Back
What can be hot on all three phases of a bone scan?
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osteomyelitis
acute fracture hypervascular tumor reflex sympathetic dystrophy neuropathic joint |
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DDx of multifocal hot lesions
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metastases
fractures multifocal osteomyelitis multiple enchondromas polyostotic fibrous dysplasia Paget's disease |
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DDx of a superscan
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diffuse metastatic disease
hyperparathyroidism |
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Tumors that cause multiple photopenic defects
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kidney
lung thyroid breast |
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Causes of bilateral increased activity along the cortex of the tibias
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shin splints
hypertrophic osteoarthropathy periosteal reaction |
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Describe the features of prostheses; loosening vs infection, cemented vs non-cemented
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loose: activity at the tip
infected: activity along the shaft cemented: activity for 1 year non-cemented: activity for 2-3 years |
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What three processes can cause focal soft tissue activity on a bone scan?
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Processes that:
1. make bone 2. calcify 3. dytrophic calcification |
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What malignant process makes bone?
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osteogenic sarcoma
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Which cancers cause calcifications?
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breast
colon ovary neuroblastoma |
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What is dystrophic calcification caused by?
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infarction
myositis ossificans tumoral calcinosis dermatomyositis polymositis |
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How do you diagnosis diskitis on a bone scan?
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increased activity in two adjacent vertebral bodies
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Difference between osteomyelitis and septic arthritis?
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Osteomyelitis does not cross joints
Septic arthritis is seen on both sides of a joint |