MSK


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 Lesion Descriptors
Number: solitary
multiple (2-5)
multiple (>5)
Location (bone): skull
jaw
orbit
cervical spine
dorsal spine
lumbar spine
sacrum & pelvis
femur
fibula
tibia
tarsal / carpal bones (1-5)
metatarsal / metacarpal bones
phalanges (proximal, middle, distal)
ribs
sternum
clavicle
scapula
humerus
radius
ulna
other
Location (joint): 1st IP (hand)
2nd-5th PIP (hand)
2nd-5th DIP
1st MCP (hand)
2nd-5th MCP (hand)
1st CMP (hand)
2nd-5th CMP (hand)
midcarpal / intercarpal (wrist)
radiocarpal (wrist)
distal (inferior) radioulnar (wrist)
proximal (sup) radioulnar / radiohumeral / humero-ulnar (elbow)
glenohumeral joint (shoulder)
acromioclavicular (shoulder)
sternoclavicular
temporomandibular (jaw)
C1-C2 (spine)
facet joints (spine)
SI (pelvis)
symphisis pubis (pelvis)
acetabulofemoral (hip)
femurotibial (medial) (knee)
femurotibial (lateral) (knee)
femuropatellar (knee)
proximal (superior) tibiofibular (knee)
distal (inferior) tibiofibular - talus (ankle)
talocalcaneal(ankle)
talocalcaneal-tarsal (ankle)
intertarsal (foot)
1st MTP (foot)
2nd-5th MTP (foot)
1st IP (toe) (foot)
2nd-5th PIP (foot)
2nd-5th DIP (foot)
Location (other): soft tissue
subcutaneus
fascia
muscles
Distribution / Topography: bilateral
unilateral
symmetrical
asymmetrical
medial
lateral
anterior
posterior
long bone - epiphysis
long bone - metaphysis (long)
long bone - diaphysis (long)
bone- proximal third
bone - middle third
bone - distal third
central
eccentric
periosteal / juxtacortical
anterior column (vertebra)
middle column (vertebra)
posterior column (vertebra)
 

 Plain film & CT Findings
Plain Film & CT: geographic or well-defined
permeative or moth-eaten
lytic/lucent
sclerotic
mixed
calcifications/predominantely calcified
calcified intra-articular loose bodies / bone debris
periarticular / subcutaneus calcifications
chondrocalcinosis
phleboliths
fragmentation and osseous debris
matrix: osteoid - ivory, fluffy, cloud-like
matrix: chondroid - arcs, rings, punctuate, stippled
matrix: fibrous - ground glass, hazy
zone of transition: wide
zone of transition: narrow
zone of transition: non-sclerotic
zone of transition: sclerotic
periosteal reaction: absent
periosteal reaction: solid
periosteal reaction: onion skin = lamelated
periosteal reaction: sunburst/hair on end
periosteal reaction: codman triangle
periosteal reaction: solitary/localized (unilateral)
periosteal reaction: bilateral symmetrical
periosteal reaction: bilateral asymmetrical
bone density: generalized increased
bone density: subchondral sclerosis
bone density: periarticular osteopenia
bone density: diffuse osteopenia
coarse trabecular pattern
thickening of the cortical bone
osteophytes/syndesmophytes
ankylosis
joint space: preserved
joint space: widened
joint space: narrowed (non-uniform)
joint space: narrowed uniform
vacuum phenomenon
geodes
subluxations / deformities
absent erosions
ill-defined erosions
well-defined erosions
marginal erosions
central erosions
 

 MRI Findings
MR signal: T1 hyperintense
T1 hypointense (lower than muscle)
T2 hyperintense-intermediate
T2 hyperintense (cyst-like)
T2 hypointense
hyperedematous (surrounding marrow edema signal >> lesion)
susceptibility artifact - hemosiderin
flow void
 

 Enhancement Pattern
Enhancement: no enhancement
faint
heterogeneous - partly cystic or necrotic
heterogeneous - nodular
thin rim (cyst like)
thick rim (abscess like)
diffuse - moderate
diffuse - strong
 

 Miscellaneous Findings
Miscellaneous: endosteal scalloping
fluid-levels
cystic degeneration
skip lesions
expansile/aneurysmal
spinal canal extension
soft tissue swelling
tophi / soft-tissue nodules
erosion of the distal tuft / distal phalangeal destruction
bone "squaring"
overgrown or ballon epiphyses
premature fusion / decreased bone length
cortical disruption / pathologic fracture
 

 Fracture Analysis
Fracture: open
closed
angulation: varus
angulation: valgus
angulation: dorsal
angulation: volar/plantar
fragment overlap
rotation
cominution: 1-3
cominution: >3
complete: transverse
complete: oblique
complete: spiral
incomplete
impaction
compression
avulsion Pattern
stress Pattern
dislocation
subluxation
 

 Patient Data
Clinic: acute
chronic
pain
painless
fever
leukocytosis
renal osteodystrophy
History: trauma
arhritis
known malignancy
prior surgery (on the same site) / pre-existing lesion
Age: years old











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