MS1: RA and OA Flashcards
what is RA ?
a chronic, inflammatory, autoimmune disease that affects the synovium
occurrence of RA
50 yo female
more in women
peak in 4th and 6th decade - 50 yo
increase chance w age
americans - caucasians - black - asian
describe onset of RA
insidous
most common joints affected by RA
wrist, MCP, PIP and MTP
as disease progresses it affects larger - mga knees, elnow and ankle
what is spared in RA
DIP and thoracolumbar
main characteristics of RA
symmetrical joint involvement pf small joints of feet
morning stiffness more than an hour
systemic symptoms
extraarticular manifestations
what are the extraarticular manifestations of RA
rheumatoid nodules
shortness of breath and chest pain - cardiopulmo involvement
orbital redness - scleresis
dry eyes and mouth
hallmark symptom of RA
morning stiffness more than an hour
most common extraarticular manifestation of RA
rheumatoid nodule
common site for rheumatoid nodules
extensor surfaces and areas subjected to mech pressure
occurrence of pleuropulmonary manifestations
more in men - pulmonary fibrosis and nodules
when does scleritis commonly occur
6th decade and more on women
BILAT
if u have scleritis what does it mean
more advanced RA - more extraarticular manifestations
classical criteria for RA
morning stiffness
arthritis of 3 or more joints
arthritis of hand
symmetric
rheumatoid nodules
serum rheumatoid factor
radiographic changes
requirements for classical criteria
score at least 4/7 and 1-4 must last for at least 6 wks
possible areas for arthritis of 3 or more factor
R and L
PIP
MCP
wrist
elbow
knee
ankle
MTP
possible areas for arthritis of hand
wrist, MCP or PIP
modern scoring for RA - joint involvement
1: one large joint
2: 2-10 large joints
3: 1-3 small joints
4: 4-10 small joints
5: > 10 joints
modern scoring for RA - lab studies
0: negative RF + CCP
2: low positive RF + CCP
3: high positive RF + CCP
modern scoring for RA - acute phase reactants
0: normal CRP and ESR
1: abnormal CRP and ESR
modern scoring for RA - duration
0: less than 6 wks
1: more than 6 wks
diagnosis for modern criteria of RA
score 6 or higher
discuss the pathophysiology of RA
inflammation in synovium
pannus forms - grainy tissue that erodes cartilage
tendons get inflamed or rupture = joint fusion
discuss manifestation of RA in cervical spine
atlantoaxial and midcervical
neck stiff and LOM
C1-C2 instability and compression