Final Flashcards
Imaging Features
What tumor has a solid periosteal reaction, cortical thickening and sclerotic borders w/radiolucent central nidus?
osteoid osteoma
What are the imaging features of osteoblastoma?
nidus bigger than osteoid osteoma w/thing eggshell border
Ca++ can occurs w/in center of nidus
What condition is poorly defined, has NO periosteal reaction or ST mass?
Mets
What condition has an ivory vertebra (blastic) and winking owl sign (lytic)?
mets
In the appendicular skeleton saber skin tibia, shepherds crook deformity and candle flame/blade of grass appearance?
Paget’s dz
Paget’s disease displays what features in the spine?
Ivory white vertebra
Picture frame cortical thickening
Corduroy cloth appearance
A. Scalloping
Enostoma aka Bone Island appearance is ill defined or well defined and has what type of borders?
well defined brush border (spicules)
What does hemangioma look like in the spine?
corduroy cloth appearance
polka dot appearance on axial imaging
What is the appearance of an hemangioma on film in the skull?
spoked-wheel w/sunburst appearance
What is the mc
Benign tumor of sacrum and patella?
GCT
What is the appearance of GCT on film?
well defined
highly expansile
soap bubble appearance
NO sclerotic boarder
What tumor condition has geographic destruction, highly expansile, can cross growth plate, periosteal Buttressing (pathomneumonic) and shows fluid on MRI?
ABC
What’s the pathomneumonic of ABC?
periosteal buttressing
What is the mc benign tumor of the hand?
Enchondroma
What hand condition is Well Defined, geographic destruction, cortical expansion and cartilage tumor matrix?
Enchondroma
What is the mc benign bone tumor of the body?
Osteochondroma
What are the two-forms of osteochondroma in the bone?
Pedunculated (cauliflower)
Sessile (Mountain)
Which form of osteochondroma is more likely to be fractured?
pedunculated
What is the appearance of acute osteomyelitis?
ST edema (earliest sign) lytic destruction periosteal elevation
What imaging features are associated w/periarticular swelling, joint space widens early but narrows late stage?
septi arthritis (osteomyelitis)
No periosteal reaction, No ST swelling, cortical thickening, ill defined lucency and sclerosis, presence of sequestrum/involucrom/cloaca are associated with what?
Chronic osteomyelitis
What looks like osteoid osteoma, but present w/infection symptoms. Lucent nidus and Lucent channel of healing leading into physis and sclerotic border?
Brodie’s access
Infectious spondylodiscitis appears how in under 20 yoa?
narrow disc height
paraspinal edema
Infectious spondylodiscitis appears how in over 20 yoa?
radiolucent focus at Anterior vertebral endplate and late disc involvement
