MSK Flashcards
prevalence of rheumatoid arthritis
1% prevalence
Risk factors and age affected of RA
40 - 60 YO
Female
family history
other autoimmune conditions
what is rheumatoid arthritis
chronic autoimmune inflammatory conditon
Typical presenation of RA
Slow onset
Symmetrical peripheral polyarthropathy
pain and stiffness in small joints, MetaCarpoPhalangeal MCP, metatarsophalangeal MTP, distal and proximal interphalangeal, DIP, PIP
pain is significantly worst in the morning and gets better throughout day, worst after rest.
knees hips elbows shoulders, less common
responds to NSAIDS
signs of RA
bony swelling. swelling in synovium of dip pip MCP MTP, often symmetrical
tenosynovitis (tendon stiffness) or bursitis (inflammation of bursa)
Rheumatoid nodules- nodules under skin, near joints. painless
Ulnar deviation
boutonniere
swan neck deformity
muscle wasting
X ray signs of RA
soft tissue swelling periarticular bone thinning, osteopenia joint space narrowing bony erosions JOES
histological finding of RA
Pannus
extra articular effects / complications of RA
Pericarditis pleural effusion pericardial effusion nerve entrapment dry eyes anemia septic arthritis
diagnosis and investigations of RA
Serology- Anti CCP diagnostic, also find rheumatoid factor and anti nuclear antibodies
Bloods- ESR CRP and anemia
x ray
diagnostic criteria of RA
Small joint involvement
serology present
increase in acute phase proteins, and inflammatory markers, ESR, CRP
chronic duration
early signs of RA
fatigue malaise swelling,
pain of inflammatory nature
management for RA
first start with symptomatic management of pain - NSAIDS
once pain managed start on DMARD within 3 months
treat flare ups of RA
surgery for entrapment complications
monitor complications
physio
How to treat RA flare ups
steroids, Intra Articular methylprednisolone or Dexamethasone.
or oral prednisolone not for long term use
What is a DMARD
Disease modifying antirheumatic drugs, steroid sparing drugs, cytokine inhibition to reduce inflammation Methotrexate
used to induce remission then dropped down to maintain remission
sulfasalazine, hydroxychloroquine
other than methotrexate, what other DMARDs are available
sulfasalazine
hydoxychoroquines
what is used to treat RA after DMARDs,
biological agents
B cell depletion rituximab
TNF alpha inhibition - infliximab
Further management and managing complications of RA
DEXA scan for Osteoporosis
control CVA risk, since having constantly increased CRP can form atheromas
refer to physio - manage activities of daily living
joint hip replacement
osteoarthritis prevalence
commonest joint disorder
50% of those over 65 are symptomatic
80% show X ray signs
osteoarthritis risk factor
Age biggest one trauma obesity occupation female genetic predisposition previous joint involvement or arthropathy
pathophysiology of OA
Loss of cartilage
disordered bone repair
has an inflammatory component
clinical features of OA
hip and knee most commonly effected
not always symptomatic but may show on X ray
can have flare ups with increased CRP and ESR
symptoms of OA
Joint pain is presenting complaint, hips or knees. gets worst as use throughout day. worst in mornings and after rest
doesn’t get better with NSAIDS
joint stiffness
loss of function
signs of OA
joint instability crepitus alteration of gait boney swelling (effusion, synovitis) joint tenderness cracking limited range of movement Heberden's nodes - DIP swelling Bouchard's nodes - pip swelling
Investigations for OA
Serology ANA RF Anti CCP -VE ESR CRP normal CRP may be elevated X Ray of OA aspiration of fluid if its present
X Ray finding of OA
LOSS loss of joint space osteophytes subchondral cyst subchondral sclerosis
Conservative Management of OA
Conservative, education, weight loss, physio and exercise. walking aids. insoles hot or cold packs
pharmacological management for OA
paracetamol and topical NSAIDS, or gel.
if painful joint effusion- corticosteroid injections
subtype inflammatory RA- DMARDs
Surgical management of OA
arthroplasty, knee or hip replacemnt
arthroscopy for loose body fragments
what are the 2 types of Crystal arthropathy and their composition
Gout: uric acid
Pseudogout: Calcium phosphate
presentation of acute gout
severely inflamed , Red Hot Swollen Painful,
monoarthropathy,
usually MTP of big toe
Investigation of gout
Joint fluid aspirate is gold standard.
polarised light microscopy
need to exclude septic arthritis
what do the results of polarised light microscopy indicated
-Ve birefringent needle - uric acid
weakly +ve birefringent needles - pseudogout, Calcium phosphate
what can cause gout attack
high uric acid, consumption of high purine food. dehydration or diuretics
suddenly stopping medication
alcohol shellfish
hereditary
treatment of acute gout
NSAIDs, or colchicine
can use intraocular steroid injections
prevention of gout attack
treatment of chronic gout
educations on what can precipitate gout and how to avoid it avoid low dose aspire avoid alcohol, long fast, loss weight xanthine oxidase inhibitor-allopurinol
treatment of chronic gout
educations on what can precipitate gout and how to avoid it avoid low dose aspire avoid alcohol, long fast, loss weight xanthine oxidase inhibitor-allopurinol use NSAIDs or Colchicine
X ray changes on chronic gout
Punched out cortex
calcium pyrophosphate deposition / pseudogout features
presentation, where and what triggers it
similar to gout presentation but more common in larger joints like- MCP, Wrist knee ankle
triggered by trauma or unprovoked
calcium pyrophosphate deposition / pseudogout management
NSAIDs or colchicine
intra-articular steroid injection
joint aspirate
association of pseudogout CPPD
Haemochromatosis, hyperparathyroidism
associations for gout
DM, hypertension, heart or renal diseae
features of chronic gout
excess uric acid deposition throughout forming tophi
Prevalence of gout
commonest cause of arthritis in men <40 YO
1%
what type of collagen is in cartilage
type 2 collagen
osteoporosis pathophysiology
Systemic skeletal disease caused by reduced bone mineral density. osteoclasts breakdown bone
osteoblasts build up bone
osteoporosis is increased osteoclasts and reduced osteoblasts
causes risk factors and associations for osteoporosis
Age, increased time the bone remodeling isn’t as well
post menopause, oestrogen Inhibits osteoclast activity
long term glucocorticoids- increase bone resorption
cushing’s disease
hyperparathyroidism
Hyperthyroidism
Inflammatory conditions - RA, IBD, due to increased cytokines and inflammation causing increased resorption
reduced skeletal loading, bed bound for ages
family history