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DXI PRACTICE EXAM
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DXI PRACTICE EXAMMonostatic vs. Polystatic - ANSWER one lesion vs. multiple
Preliminary Analysis - ANSWER age, sex, race, history, number of lesions,
symmetry of lesions
Asymmetric lesions vs symmetric - ANSWER asymmetric - metastatic dz
symmetric - disseminated dz
Analysis of lesion - ANSWER skeletal location, position w/in bone, site of origin
Medullary origin - ANSWER central, thinning of the cortex, endosteal scalloping
esp. cartilaginous lesion
Cortical origin - ANSWER eccentric position
destruction, distortion expansion of cortical bone
periosteal response
Periosteal origin - ANSWER close apposition but clear separation from the
majority of the underlying bone
the notable lesion in soft tissue
Extra-osseous lesion - ANSWER separated from bone w/in soft tissue
may cause pressure erosion on adjacent bone
Slow-growing tumor - ANSWER <6cm at time of discovery
most aggressive lesions are larger
except: aneurysmal bone cyst, simple bone cyst, giant cell tumor, fibrous dysplasia
Short vs long lesion - ANSWER short - <6cm, often secondary such as metastatic
dz
long - primary disorders
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