Imaging Arthritis Flashcards
why is there reduced joint space in osteoarthritis?
because of asymmetric cartilage wear
what causes sclerosis of bone in OA?
increased subchondral bone CELLULARITY and VASCULARITY excites bone turnover
why do cysts form in OA?
synovial fluid dissects into it
why do osteophytes form in OA?
periosteal stimulation
why do you get joint deformity in OA?
weakened bone caves
what causes the soft tissue swelling in RA?
synovial proliferation
reactive joint effusion
why do you get periarticular osteoporosis in RA?
get bone demineralisation from hyperaemia
what does the pannus do to bone?
destroys it
in what cases would OA affect an unexpected site?
overuse
injury
other arthritis
what is the name for an OA affecting an unexpected site because of something else?
secondary OA
what causes the joints to become deformed and subluxed in RA?
capsular and ligamentous softening
what is ankylosis?
exposed eroded bone ends fusing
do you get ankylosis in RA?
yes
what type of arthritis commonly has sacroiliac and spine involvement?
seronegative
does bone form or deteriorate in seronegative arthritis?
forms around periarticular areas
