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31 Cards in this Set
- Front
- Back
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What is the ddx for acetabulo protrusio (acetabulum extends beyond the ileo-ischial line)
5 |
Pagets
RA OA osteomalacia osteoporosis |
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What is the ddx for acro-osteolysis
7 |
burns/frost bite
scleroderma hyperparathyroidism psoriasis raynauds disease leprosy |
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What is the ddx for avascular necrosis of bone
8 |
Idiopathic (legg-calve-perthe dz)
steroids sickle cell anemia arteritis (CVD) trauma gauchers pancreatitis fat embolism |
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Can pancreatitis and fat embolism cause AVN
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apparently yes
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What two systemic congenital disease may causes AVN
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sickle cell
gauchers |
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What does AVN of the hip look like on pelvic plain view
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mottled density of head with some flattening and irregularity of the head
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What is the ddx for hypertrophic osteoarthropathy
5 |
carcinoma of the lung
mesothelioma chronic lung disease cirrhosis UC |
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Can UC and cirrhosis cause Hypertrophic osteoarthropathy
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yes
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What are the findings with hypertrophic osteoarthropathy
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thick wavy periosteal reaction
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Does hypertrophic osteoarthropathy commonly effect the epiphysis
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no, it is spared
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What is the ddx for lesions that affect the spine
4 |
mets
osteoblastoma chordoma ABC |
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what is a classic finding for an osteoblastoma
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expansile lesion of posterior elements of the spine
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What is the ddx for lesions that affect the pelvis
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chondrosarcoma
plasmacytoma chordoma |
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What are the findinds of a chondrosarcoma on plain film
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lytic lesion with chondroid matrix and cortical destruction that commonly affects the pelvis
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What is the ddx for posterior scalloping of the spine
3 |
neurofibroma
achondroplasia spinal cord tumor like ependymoma |
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What causes a posterior vetebral scalloping in neurofibromatosis
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erosion of the vetebral body by neurofibroma because of dural ectasia
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What are 6 findings in neurofibromatosis 1
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neurfibroma
freckeling of axilla and groin cafe au lait spots lisch nodules (hamartoma of iris) and freckling of iris macrocephally without hydrocephalus optic glioma |
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What 3 tumors are pt with neurofibromatosis 1 at increased risk for
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glioma
pheochromocytoma meningiomas |
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What are the findings of neurofibromastosis 2
4 |
bilateral acoustic neuromas (cranial nerve 8)
deafness dizzyness facial paralysis (cause of compression on other CN 7) |
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What are pt with neurofibromatosis 2 at risk for
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meningioma, ependymomas
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What are 4 types of gliomas
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ependymoma
astrocytoma oligodendroglioma optic glioma |
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What is the ddx for anterior scalloping of the spine
3 |
aortic aneurysm
neurofibroma TB |
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What is the ddx for lucent metaphyseal bands
4 |
normal
leukemia neuroblastoma TORCH infections |
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What are the TORCH infections
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toxoplasmosis
other rubella cmv herpes |
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What is the ddx for dense metaphyseal bands
4 |
normal
lead poisoning treated leukemia healing rickets |
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What is the ddx for bone with in a bone
3 |
osteopetrosis
pagets thorotrast |
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What is the ddx for chondrocalcinosis
6 |
pseudogout
gout oa hyperparathyriodism hemochormatosis wilsons disease |
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What is the ddx for intramedullary calcification
3 |
enchroma
bone infarct chondrosarcoma |
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What is the ddx for thinned ribs
2 |
neurofibromatosis
osteogenesis imperfecta |
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What is the ddx for wormian bone
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normal
hypothroidism downs syndrome cleidocranial dysostosis osteogenesis imperfecta |
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What are wormian bones
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small bones inbetween suture lines
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