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bone tumour (destructive pattern (geographic (slow, chronic
sclerotic…
bone tumour
destructive pattern
geographic
- slow, chronic
- sclerotic margin (slowest growth)
- well defined but no sclerotic margin (slow growth)
- ill-defined margin (questionable activity)
geographic, expansion of cortex, but the cortex still intact (defined border(, soap bubble appearance
motheaten and permeative
- aggressive, acute process
wash out fuzzy appearance, pathological fracture
changing pattern
malignant transformation of benign lesion, fracture of a lesion, increased activity of a lesion
motheaten, invasion of lesion into soft tissue, aggresive lesion,
other features
location - single/multiple (if multiple, probably not a tumour unless metastatsis from another tumour site)
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position
transverse - central, eccentric, cortical or paraosteal
longitudinal - epiphyseal, metaphyseal, metadiaphyseal or diaphyseal
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unicameral bone cyst
thin sclerotic margin, can calcifies in the center as increased density (intraosseous lipoma)
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trabeculations
giant cell tumour
fine trabeculations in tubular bone
coarse appearance in irregular bone
geographic - common in 1st metatarsal
aneursymal bone cyst
fine trabeculation, sometimes horizontally oriented due to fluid levels
large geographic lesion -central, not cross physis or epiphysis/ expansile but cortex not disrupted. some trabeculations
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chondromyxoid fibroma
course trabeculations
soap bubbly, thick coarse 
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visible tumour matrix
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fibrous
ground glass (hazy, the appearance of view box plastic)
ill-defined geographic lesion, but hazy appearance in the center
other findings
periosteal reaction
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interuppted
outer surface of the cortex is scalloped, well-defined bone production is seen at the margins e.g. juxtacortical chondroma
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- break through cortex - aggressive process (ill defined), secondary soft tissue mass suggest malignancy
- enchondroma
- osteochondroma
- chondromyxoid fibroma
- osteoid osteoma
- aneurysmal bone cyst
- solitary bone cyst