Arthritis Flashcards
Arthritis consists of over ___ different diseases/conditions
-___ under age 65
- 100
- 2/3
define rheumatoid arthritis
a systemic inflammatory disease primarily affecting joint synovium
define osteoarthritis/ degenerative joint disease
localized process involving destruction of cartilage tissue
What does OA look like on a radiograph?
sclerosis/thickening of the bone. lights up bright white
What does RA look like on a radiograph?
washed out bone, inflammation, joint space narrowing, joint erosion
RA
- spontaneous ____
- related to _____
- exacerbation and remission
- other rheumatologic conditions (JRA, SLE, scleroderma)
Criteria for RA (conditions)
must meet 4/7, 1-4 must be > 6 weeks duration
Criteria for RA
- morning stiffness (at least 1 hour)
- arthritis of 3 or more joint areas
- arthritis of hand joints
- symmetry
- rheumatoid nodules
- positive serum rheumatoid factor
- radiographic evidence
RA
- women __ men
- peak age
- more women than men (2:1 or 3:1 ratio)
- between 60-70
RA
- type of disorder
- etiology
- rheumatoid factor
- autoimmune
- unknown
- autoantibody against IgGFc; in about 70% of patients
Patho of RA
- infiltration of synovium by ___
- production of ____
- hyperplastic synovium invades ___
- other things that occur
- CD4+ Tcells, B cells, monocytes/macrophages
- inflammatory cytokines and chemokines
- (pannus) invades cartilage, subchondral bone, articular capsule, and ligaments
- venous distension, cap. obstruction, thrombus, hemorrhage
Diagnostic tests for RA
no single test
exclude other diagnoses
clinical presentation
lab/radiographic findings
differential diagnosis (name a few)
OA, reiter’s syndrome, IBD, gout, psoriatic arthritis, polymyalgia, infection, fibromyalgia, SLE, sarcoidosis
clinical presentation of RA
insidious onset, symmetrical morning stiffness, generalized fatigue, weight loss, depression, rapid progression in first 6 years
3 types of disease course
- monocyclic: (20%) one episode that abates within 2 yrs
- polycyclic: (70%) fluctuating
- progressive and unremitting (10%)
patterns of RA involvement
- symmetrical
- ____ most commonly involved
- joint _____
- crepitus
- 80% develop _____ within 10 years
- hands and wrists
- inflammation
- permanent joint abnormalities
patterns of RA involvement
- _____ rarely involved
- ______ sometimes affected
- may be accompanied by ________
- axial skeleton
- cervical spine
- joint ankylosis or ankylosing spondylitis
ABCs of radiology
alignment, bone density, cartilagenous spacing, soft tissue
RA involvement of wrist
volar subluxation and ulnar displacement of carpals in relation to radius
- flexion contractures
- De Quervain’s and carpal tunnel common (due to synovitis)
what is often the first clinical feature of RA?
symmetric MCP and PIP joint involvement
RA hand involvement
- MCPs
- PIPs
- Thumb
- DIPs
- volar subluxation and ulnar drift
- swan neck and boutonniere deformity with osteophytes, bouchard’s nodes
- IP hyperextension and MCP flexion, with progressive CMC involvement
- usually uninvolved
mutilans deformity
severe deformity with profound instability and functional impairment
RA of the hip joint
- not as common as in RA
- characteristic joint space narrowing with intact articular cortex
- consider treatments that reduce risk of hip joint degeneration
RA of the knee joint
commonly involved, large amount of synovium
-flexion contractures due to pain and muscle guarding
RA of the foot/ankle
- ____ hindfoot
- collapse of _____
- hallux valgus
- MTP ____
- ______ toes
- pronated
- longitudinal and transverse arches
- subluxation
- hammer/claw
RA muscle involvement contributions
disuse atrophy, myositis, steroid-induced myopathy/peripheral neuropathy