Final Flashcards
What are the upper size limits for RPI and RTI?
7mm and 22mm
What are some osteoporosis type changes noted involving the vertebrae?
bioconcave, wedge, and collapsed
What is endobone?
bone in a bone
What are the names for bone in a bone?
osteopetrosis, marble bone, and Albers-Schoenberg disease
What color is normal bone marrow on T1?
white is right
What findings suggest osteopenia?
decreased bone density, trabecular changes, washed out appearance, cortical thinning, and changes of vertebral shape
What are some radiographic features of spinal osteoporosis?
decreased bone density, cortical thinning “pencil thin”, reabsorption of nonstress-bearing trabeculae, accentuated vertical struts, and altered vertebral shape
What is the three column method criteria for mechanical stability of the vertebra?
fracture of column A or C is stable, fracture of column B or any two regions is unstable
What is paintbrush metaphysis a sign of?
rickets
What are some findings of osteoporosis in an extremity?
thinned cortices (pencil thin), endosteal scalloping, loss of the secondary trabeculae, risks of fractures
Hyperparathyroidism related to renal disease could be called?
renal osteodystrophy
What is Ward’s triangle?
accented trabeculation, causing a prominence of Ward’s triangle
What is Ward’s triangle associated with?
osteoporosis
What are the three trabeculation patterns?
primary compressive band, secondary compressive band, and primary tensile band
What are mottled cystic density and flattened epiphysis associated with?
Legg-Calve Perthes disease
What is Legg-Calve Perthes disease?
AVN of the femoral head in a child
What is decreased anterior height associated with?
compression fracture
What does a step defect mean?
new fracture
What are the differential diagnosis for pathologic compression fractures?
multiple myeloma, osteoporosis, and lytic metastasis
What is “rain drop skull” associated with?
multiple myeloma
What is Sever’s disease?
a variant of ossification in the heel
What could cause a resorption of the distal clavicle with widening of the AC joint?
HPT, inflammatory joint disease, post traumatic osteolysis, infection, and lytic mets
What causes Rugger-Jersey spine?
HPT
What are the radiolucent lines at a right angle to the parent bone called?
Looser Lines
