MSK Flashcards
Where does osteoarthritis commonly effect?
Heberden’s nodes- distal interphalangeal
Bouchard’s- proximal interphalangel
It commonly will effect the base of the thumb and the big toe
What is seen on a x ray for osteoarthritis?
L- loss of joint sapce
O-osteophytes
S-subchonral cysts
S- Subarticular sclerosis
What is the management of osteoarthritis?
Exercise to build up muscle
Para or NSAIDS for pain (No NSAIDs in elderly or diabetic)
Then go to NSAIDs/COX-2 inhibitors
Intra-articular corticosteroid injection
What are gout crystals composed of?
Monosodium urate
What are pseudogout crystals composed of?
Calcium pyrophosphate
What can cause gout?
Hereditary, increased red meat, alcohol excess, diuretics, trauma, leukaemia, sugery
What prevents a gout attack?
Allopurinol
What do we see on X ray for gout?
Soft tissue swelling and punched out lesions
What test do we do for gout and psuedogout?
Polarised light microscopy of synovial fluid
How do we treat acute gout?
- Ice and elevate
- NSAID/ colchicine
- Joint aspiration and intra articular corticosteroids
What is seen on a pseudogout x ray?
Soft tissue calcium deposition
How do we treat chronic gout?
Methorexate (DMARD) and hydrochloroquine
What produces monosodium urate from nucleic acid?
Xanthine Oxidase
Where does gout and pseudogout effect?
Gout- small joints and usually monoarthropathy
Pseudogout- Large joints and polyarthropathy
What is the diagnostic antibody for rheumatoid athritis?
Anti-CCP antibodies
What gene is Rheumatoid arthritis associated with?
HLA-DR4
What will we see on investigation for rheumatoid arthritis?
Rheumatoid factor, Anti CCP (specific), high platelet, normocytic aneamia, high ESR and CRP
What is seen on an Xray for rheumatoid arthritis?
LESS Loss of space Erosion Soft tissue swelling Soft bones
Which joints does rheumatoid often effect?
Small joints of the hands and feet, MCP and PIP joint
What are the signs for rheumatoid arthritis?
Ulnar deviation, boutinniere, swan neck deformaty, Z thumb, muscle wasting
How does rheumatoid arthritis occur?
Macrophages enter the synovium, producing angiogenic cytokines and synovium that grows over cartilage to form a pannus. The synoviocytes produce RANKL and proteases which cause cartilage degregation.
How long doe pain last in the morning for rheumatoid?
Greater than 30 minutes
First treatment of rheumatoid arthritis?
2 DMARDs including methotrexate and a glucocorticoid
What is used in the treatment of rheumatoid flares?
Short term glucocorticoids
What is an alternative to DMARDs for rhuematoid treatment?
Anti-TNF
Which of osteoarthritis and rheumatoid arthritis responds well to NSAID use?
Rheumatoid arthritis
What is seen on a X-ray of someone with alkylosing spondylitis?
Syndesmophytes
Sacroiliitis
Bony proliferations
calified ligaments to create a bamboo spine
What antigens are and aren’t present in spondyloarthropathies?
HLA B27 is present but there is no rheumatoid factor present
What joints are affected in spondyloarthropathies?
Sacroiliac joint and spine
What is the posture seen in ankylosing spondylitis called?
Kyphosis
Question mark spine
What is the management of ankylosing spondylitis?
First exercise and manage CVD risk
Can add NSAIDS or coxib
If still bad then use corticosteroid injections and TNF alpha inhibitors
What are the 3 main signs of reactive arthritis?
Reiter’s traid:
Urethritis, arthritis and conjunctivitis
Which joints does reative arthritis affect?
Large joints
Is reactive arthritis sterile or not?
Sterile
What bacteria cause reactive arthritis?
Chlamydia, ureaplasma, campylobacter, shigella, salmonella or Yersinia
What is the investigation for ankylosing spondylitis?
MRI scan
What is the management of reactive arthritis?
Aspirate synovial fluid, NSAIDs, Corticosteroids, antibiotics
Methotrexate if longer than 6 months
What pattern does psoriatic arthritis present with?
Relapsing remitting
How does psoriatic arthritis present?
Rash, swelling, pain and tenderness, dactylitis and onycholysis
What defromity is seen in psoriatic arthritis?
Pencil in cup
Management of psoriatic arthritis?
NSAIDs, DMARDs, ciclosporin, anti-TNF
What is the triad for septic arthritis?
Low grade fever
Impaired range of motion
Painful large joint such as the knee
Common causes of septic arthritis?
S.Aureus, Streptococci, Nisseria gonococcus
What are the investigations for septic arthritis?
Aspirate the joint
Blood cultures
Plain x ray as CRP can be normal
What is the management of septic arthritis?
Splint limb IV antibiotics (flucloxacillin- clyd if allergic) for 2-3 weeks then oral antibiotics for 2-4 weeks Replace infected prosthetic joint
What is the treatment for MRSA?
Vancomycin or teicoplanin
What is septic arthritis an infection of?
surface cartilage
What is osteomyelitis an infection of?
The bone and is seen most commonly in children
How do you diagnose osteomyelitis?
Bone culture
What is the treatment for Raynaud’s disease?
Keep warm, stop smoking, Nifedipine (CCB)
What is discoid lupus?
Lupus where only the skin is effected
What gender is SLE more common in?
Women (esp black and asians)
What are the signs of SLE?
SOAP BRAIN MD Serositis Oral ulcers Arthritis Photosensitivity
Blood(anemia and thrombocytopenia) Renal Ana positive Immunologic (DS DNA) Neurologic (seizures)
Malor rash
Discoid rash
What is the key blood feature of SLE?
High ESR but normal CRP
What type of sensitivity is SLE?
Type 3
What is the drug treatment for acute flares of SLE?
IV prednisolone and IV cyclophosphamide
What is the drug treatment for chronic SLE?
NSAIDs and hydroxychloroquine
Where does Sjogren’s effect?
Exocrine glands
What are signs and symptoms of Sjogren’s?
Dry eye and mouth, enlarged salivary glands, rash, fatigue, malaise
How do we test for Sjorgens?
Schirmer’s test
Serology- ANA, RF, Anti-ro
Biopsy shows infiltration of plasma cells and lymphocytes
How do we treat sjorgens?
Tear replacement
Vaginal lube
NSAID
Immunosuppressant
How does dermatomyositis present?
Lilac periorbital rash, sunburnt cheeks, sholder, subcutaneous calcifications, weakness so hard to get out of chairs
What is the treatment for dermatomyostits?
Corticosteroids
What is polymyositis?
Inflammation and progressive necrosis of skeletal muscle fibres
What is the presentation of polymyositis?
Difficulty squatting and with stairs, can’t raise hands above head
What is systemic sclerosis?
Abnormal growth and deposition of connective tissue effecting skin, face, forearms and lower leg
What is antiphospholipid linked to?
CLOT Coagulation defects Livedo reticularis Obstetric- multiple miscarriages Thrombocytopenia
What is the treatment for antiphospholipid syndrome?
Low dose aspirin or warfarin
What confirms a Giant cell arteritis diagnosis?
Temporal artery biopsy
What is the treatment for giant cell arteritis?
Prednisolone
What is Wegner’s?
Necrotizing GRANULOMATOUS vasculitis mediated by neutrophils
What are the symptoms of Wegener’s?
Cough, stuffy nose, sinusitis, haemoptysis, haematuria, saddle nose deformity
What special tests are done for Wegener’s?
c-ANCA and PR-3 ab
Renal and lung biopsy for granulomas
What is maintenance treatment for wegeners?
Azathioprine
What is the triad for Churg-strauss syndrome?
Asthma, eosinophilia and vasculitis (like wegeners)
What are the common secondary sites of bone tumours?
Breast Lung Thyroid Renal Prostate
What are the risk factors for osteoporosis?
ACCESS Alcohol use, Corticosteroid use Calcium low Estrogen low Smoking Sedimentary lifestyle
What is the FRAX score?
Acesses osteoporosis risk Country Age Weight Height Previous fracture Hip fracture in parents Smoking Glucocorticoids Rhuematoid Linked disease 3+ drinks a day Bone mineral density