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12 Cards in this Set

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

Septic arthritis is seen on both sides of a joint