Rheumatology Flashcards
approach to joint: single joint
septic
crystals
approach to joint: multiple joints
osteoarthritis lupus rheumatoid scleroderm myositis seronegatives
approach to joint pain: chronic
osteoarthritis, lupus, rheumatoid, scleroderma, myositis, seronegatives
approach to joint pain: acute
septic, trauma, crystal, reactive
approach to joint pain: isolated
septic, crystal
approach to joint pain: systemic manifestations
seronegative (IBD)
lupus (face, CNS, renal, heart, lung)
rheumatoid (nodules, serositis)
reactive (oral + genital ulcer)
approach to joint pain: degenerative
osteoarthritis
approach to joint pain: inflammatory
everything else
normal joint serology
clear
<2% wbcs
<25% polys
no gram/cx/dx
non-inflammatory joint serology
clear <2% wbcs <25% polys no gram/cx dz osteoarthritis
inflammatory joint serology
yellow, white >2, <50 wbcs >/= 50% polys no gram/cx dz everything but OA/infection
sepsis joint serology
opaque >50 wbcs >/= 75% polys \+ gram/cx dz infection
antinuclear antibodies
sensitive lupus
anti-histone antibodies
specific drug-induced lupus
anti-ds-DNA antibodies
specific lupus + renal involvement
anti-smooth muscle antibodies
autoimmune hepatitis
anti-mitochondrial antibodies
primary biliary cirrhosis
anti-centromere antibodies
scleroderma (CREST)
anti-Ro+La antibodies
sjogren’s
anti-CCP antibodies
rheumatoid arthritis
anti-RF antibodies
rheumatoid arthritis
anti-Jo antibodies
polymyositis
anti-topoisomerase antibodies
systemic scleroderma
lupus path
autoimmune, complex formation
lupus pt
women > men
blacks > whites
lupus pt
MD SOAP BRAIN Malar rash Discoid rash Serositis Oral ulcers Arthritis Photosensitivity Blood Renal failure ANA Immunologic Neurology
lupus dx
1st: ANA
then: ds-DNA
- anti-smith
- anti-histone (drug induced)
lupus nephritis
- U/A -> bx kidney
flare
- complement levels decrease in flare
- complement levels increase in infection
lupus tx
reduce flares: hydroxychloroquine control symptoms: NSAIDs flare: prednisone severe: mycophenolate mofetil nephritis: IV cyclophosphamide
drug-induced lupus path
drugs
procainamide
α-methyldopa
hydralazine
drug-induced lupus pt
NO visceral involvement
skin and joints only
drug-induced lupus dx
anti-histone
drug-induced lupus tx
remove drug
antiphospholipid antibody (APLA) syndrome path
lupus “anticoagulant” (in the lab) actually causes coagulation (in the body)
anti-cardiolipin antibodies
anti-cardiolipin antibodies
antiphospholipid antibody (APLA) syndrome
antiphospholipid antibody (APLA) syndrome pt
arterial AND venous clots
lupus
false + RPR … negative FTA-abs
antiphospholipid antibody (APLA) syndrome dx
increase PTT, normal INR
mixing study fails to correct
Russell Viper Venom tests
antiphospholipid antibody (APLA) syndrome tx
warfarin + aspirin
rheumatoid arthritis path
autoimmune disease
women > men
age > 40
panes formation -> joint destruction
RA pt
Nobody Should Have Rheumatoid Symptoms 3 times (x) N: nodules S: symmetric H: hands R: RF or CCP S: stiffness 3: 3 or more joints, spares DIP X: xray shows erosions
RA dx
1st RF or CCP
RF tx
DMARDs (everyone and early) biologics (severe) ... NSAIDs (sxs) steroids (flare)
DMARD = methotrexate NSAID = ibuprofen/meloxicam biologics = etanercept, infliximab
RF f/u
screen for TB and fungus before biologics
spine involvement = C1 and C2
bilateral carpal tunnel syndrome could be early RA
Felty syndrome = RA + neutropenia + splenomegaly
Giant cell Arteritis path
multinucleated giant cells in large vessels like the temporal artery
GCA pt
age > 50
unitemporal head pain
tender jaw claudication
vision loss
GCA dx
biopsy (skip, treat first)
GCA tx
give steroids before biopsy
GCA f/u
elevated ESR, CRP, low-grade possible findings
polymyalgia rheumatica path
similar pathology to GCA, large-vessel vasculitis
polymyalgia rheumatic pt
symmetric pain and stiffness of neck, shoulder, and hip girdle
proximal muscle weakness but normal CK (idiopathic inflam myop)
polymyalgia rheumatica dx
clinical (normal CK, high ESR)
polymyalgia rheumatica tx
steroids
polymyalgia rheumatica f/u
angiogram rules out other diseases
takayasu arteritis path
giant-cell arteritis of the aorta, subclavian, or axillary arteries
takayasu arteritis pt
asymmetric pulselessness, discordant BPs left to right arm
pulseless disease
< 40
takayasu arteritis dx
angiogram (CT, MRI, direct)