Imaging arthritis Flashcards
Where does OA affect?
weight bearing or active joints
spine,hio,knee,thumb base,DIP (primary OA)
OA occasionally affects unexpected sites in secondary OA due to overuse, previous injury or previous arthritis
OA is symmetrical T/F
F- involvement asymmetrical within or between joints e.g. right hip and left knee
Aysmmetric cartilage wear leads to asymmetric _____ ____ reduction
joint space
Increased _____ ____ ____ and ____ excites bone turnover leading to sclerosis of subchondral bone
subchondral bone cellularity and vascularity
Synovial fluid dissects into bone forming ___
cysts
periosteal stimulation leads to _____ ____ ____
marginal osteocyte formation
RA is usually symmetrical
T
Where does RA usually affect?
MCP,MTP
PIP (not DIP)
Wrists,hips,knees and shoulders
Atlantoaxial joint (C1/2)
Synovial proliferation and reactive joint effusion cause __ __ ____
soft tissue swelling
Hyperaemia causes ____ ______ resulting in periarticular osteoporosis
bone demineralisation
Inflamed thickened synovial (pannus) destroys bone initially at joint margins T/F
T - AND THEN throughout the joint
Capsular and ligamentous softening allow joint ___ and deformity
subluxation
What is is called when exposed eroded bone ends fuse?
ankylosis
Where does psoriatic arthritis affect
small joints of hands and feet
DIP joints, IP joints great toe
Increased vascularity around joints accompanied synovitis and it is shown by…
an isotope bone scan
