Extremity Views Flashcards
Motive
Pain or dysfunction
Check the periosteum
Periosteal reaction - parallel and spiculated
Parallel periosteal reaction aka
Linear
Laminated
Parallel periosteal reaction
Ewing’s sarcoma
Infection
Trauma
Only in long bones
Spiculated periosteal reaction aka
Sunburst
Radiating
Trauma
Look for fx or bony callus
Infection
WBC count, staph aureus
<25 laminated without bony callus
Either Ewing’s or osteomyelitis
> 30 without callus
Osteomyelitis
Spiculated/radiating/sunburst primary bone cancer
Osteosarcoma
Chondrosarcoma
Fibrosarcoma
Only time you pick osteosarcoma over 30
Late stage paget’s
Trauma and infeciton do not
Expand
Check the cortex
Thinning
Thickening
Interruption
Deformity of the cortex
Thinning of the cortex
Osteoporosis
Grey bone/grey soft tissue with pencil thin cortices
Thickening cortex
Paget’s
Interruption of cortex
Fracture or non-union
Deformity of cortex
Pagets
Fibrous dysplasia
Check teh medulla
Whiter - blastic mets
Pagets
Darker - lytic mets, mm, BBT
Loss of joint space
Yes = DJD/RA No = AVN
Salter harris fracture types 1-5
Type 1 - epiphysis slides along metaphysis (SCFE)
Type 2 - through growth center and metaphysis
Type 3 - through growth center and epiphysis
Type 4 - thorugh epiphysis, growth center, and metaphysis
Type 5 - compression of growth center
Most common salter harris
Type 2 through growth center and metaphysis
Calcification of the muscle belly
M/c seen in biceps and quadriceps
Myositis ossificans
Calcium within muslce
Can work on them
M/c/c major repetitive trauma
Pt typically an athlete
Myositis ossificans
3 ways to differentiate between primary malignancy (sarcoma) and Myositis ossificans
Both look extremely white on film
Periosteal rxn = primary malignancy
MO usually parallel to shaft
