General Joint Radiology Flashcards
Degenerative Joint disease
types
Non-inflammatory
inflammatory
Degenerative Joint Disease:
Non- Inflammatory
Idiopathic
aging change
Degenerative Joint disease
Non-inflammatory
Developmental
Hip dysplasia
Elbow dysplasia
OCD
Degenerative Joint disease
non-inflammatory
Acquired
trauma
neoplasia
Degenerative Joint disease
inflammatory
types
infectious
immune-mediated
Degenerative joint disease
Inflammatory
immune-mediated
Erosive
non-erosive
Degenerative Joint disease
Inflammatory
Immune-mediated
Non-erosive
idiopathic
sle, drug induced, neoplasia
Normal anatomy
synovial joint
2 bones
joint capsule (synovial membrane)
synovial fluid
cartilage - articular (highland)
Radiographic signs of Degenerative Joint Disease
Soft tissue
joint space
articular surface
Subchondral bone changes
Ne bone formation : enthesophytes and osteophytes, intra-articular mineralization
Signs of joint disease
soft tissue swelling
Assess facial planes and infrapatellar fat pad
Obliterations, compression, or reduced visualization
Query if intra-articular or extra-articular
Signs of Joint disease
Soft tissue swelling
intra-articular
Loss of normal infrapatellar fat pad and caudal fascial plane
Signs of Joint disease
Soft tissue swelling
Extra-articular
Compression of the fascial planes from outside the joint
Signs of joint disease
Soft tissue swelling
Soft tissue mass
hypertrophied/hyperplastic or inflamed synovium
tumor tissue
Signs of Joint disease
Soft Tissue Swelling
Effusion
Inflammatory effusion
Hemarthrosis
Infection
Signs of Joint disease
Gas
Intra-articular
Iatrogenic
vacuum phenomenon
shoulder
hip
infection
Signs of joint disease
gas
extra-articular
iatrogenic
infection
signs of joint disease
Altered joint space width
increased
thickened cartilage
Immature
LCPD: legg calves perthes disease / avascular necrosis of the femoral head/aseptic necorsis of the femoral head
effusion or mass
joint laxity: rupture ligaments, inherited laxity
Erobed subchondral bone
Signs of Joint disease
Altered joint space width
decreased
not centering on joint
cartilage destruction
DJD
Muscle atrophy
Signs of joint disease
Altered subchondral bone
Irregular margins
- immaturity
- tuberculum majus
- Femoral condyles
- Abnormal development
- Destruction or Fragmentation
- osteochondrosis
- sepsis
- necrosis eg LCPD
- Trauma
- immune mediated joint disease
Signs of Joint disease
Altered subchondral bone
increased opacity
Remodeling due to eccentric stress/weight bearing
Eburnation: cartilage destruction with sclerosis of subchondral bone
Peri-articular bone proliferation with subsequent superimposition
Eburnation
Signs of joint diseae
new bone formation
Osteophyte
-
Osteophyte: is an outgrowth of bone at the margin of the articular surface
- AKA boney spur
- neovascularization at the chondrosynovial junction with subsequent fibrocartilage formation
- This fibrocartilage ossifies over time
- Defining feature of osteoarthrosis/DJD
Signs of Joint disease
new bone formation
enthesophyte
Enthesophyte: is an outgrowth of bone at an enthesis (non weight bearing surface)
Enthesis: attachment of ligament, tendon, or capsule on bone
DJD shoulder joint
red - osteophytes
black - capsular enthesophytes
Elbow Joint
normal
DJD elbow joint
yellow - osteophytes
Red - enthesophytes
Joint capsule
Coxofemoral joint
DJD coxofemoral joint
remodeling of the acetabulum and femoral head: indicative of chronicity
Pseudo-articulation
Non-inflammatory Joint Disease:
Synovial Cell Sarcoma
malignant synovioma
slow growing
metastasize in 50%
large soft tissue component
Dogs > cats
Epiphyseal punched out lytic areas
Subchondral bone usually spared
Minimal to no periosteal reaction
Inflammatory Joint Disease:
Septic arthritis
- Infectious
- bacterial
- penetrating wounds
- from contiguous sites
- Hematagenous
- Viral/fungal/protozoal infections are rare
- bacterial
- If seen then irreversible joint damage has occurred
- early:
- ST swelling, effusion
- 7-10 days
- subchondral bone loss
- destruction and irregularity
- subchondral lucencies
- adjacent sclerosis
- metaphyseal periosteal reaction
- collapsed joint space
- early: