Arthritis Flashcards
‘Symmetrical inflammatory arthritis affecting the peripheral joints’ is what?
Rheumatoid arthritis
What problems occur if RA is left untreated?
Deformities, joint damage and loss of function
As well as the joints, RA can also cause inflammation in organs. True or false?
True
Which sex is more likely to suffer from RA? By how many times?
Women are 3 times more commonly affected than men
What age group does RA affect?
Any age group
What is RA known as when it occurs in under 16s?
Juvenile idiopathic arthritis
RA is an autoimmune disease. True or false?
True
HLA-DR4 mediates which condition?
Rheumatoid arthritis
What are some potential triggers for RA?
Smoking, stress, infections
The presence of antibodies in RA has what effect on the prognosis?
Generally implies a worse prognosis
What is the main structure affected by RA?
The synovium
Which two areas does synovium line?
Inside of synovial joint capsules and tendon sheaths
Which disease only affects joints which have synovium?
Rheumatoid arthritis
Where in the spine can RA affect? Why?
C1 and C2, only spinal joints with synovium
What causes the joint destruction in RA?
Inflammatory cytokines
RA can cause joint fusion. True or false?
True
Which biologic agent works by depleting B cells?
Retuximab
In RA, T cells cause macrophage activation to release what 3 things?
TNF alpha, IL-1 and IL-6
Rheumatoid factor is released by what type of cell?
B cells
Infliximab and adalimumab work by inhibiting what?
TNF alpha
Tocilizumab works by inhibiting what?
IL-6 receptor
On x-rays for RA, it often looks like bits of bone have been eaten off (erosion)- what causes this to happen?
Osteoclast activity
What do osteoblasts do?
Lay down bone
What do osteoclasts do?
Resorb bone (remove cells by gradual breakdown)
Which condition spares the DIP joints?
Rheumatoid arthritis
Early RA is defined as when since symptoms began?
Less than 2 years
What is the therapeutic window of opportunity for better outcomes in RA?
The first 3 months since symptom onset
What causes morning stiffness for more than 30 mins?
Rheumatoid arthritis
Rheumatoid arthritis is usually asymmetrical. True or false?
False- it is usually symmetrical, though it can present in one joint before the other
Will you see radiographic changes in early RA?
No
What are the two main inflammatory markers?
CRP and PV
Apart from autoantibodies and inflammatory markers, what else could be seen in routine blood tests of an RA patient?
Anaemia and raised platelets
What types of imaging can be used for RA? Which is the gold standard?
X-rays
Ultrasound
MRI (gold standard)
Compressing the MCP and MTP joints will be painful in what condition?
Rheumatoid arthritis
What two auto-antibodies are associated with RA?
Rheumatoid factor (IgM) Anti-CCP
Anti-CCP antibody is associated with which condition?
Rheumatoid arthritis
If a patient does not have the specific antibody, could they still have RA if the clinical signs were there?
Yes
What is tenosynovitis?
Tendon sheath inflammation
What is damage to the flexor tendons of the hand known as?
Trigger finger
Carpal tunnel is the compression of which nerve? Which fingers does this supply?
Median nerve- supplies the middle 3 fingers
What is palindromic rheumatism?
Rheumatoid arthritis which comes and goes
Can RA have systemic symptoms?
Yes
When should x-rays be done for RA?
Whenever a patient presents- it is standard to do an x-ray of the hands and feet, even if there are no symptoms there
Early rheumatoid will show what on an x-ray?
Nothing
What scoring system is used to assess RA?
DAS28
What parts of the body are missed out of the DAS28 system?
Feet and ankles
What DAS28 score is indicative of severe, active disease?
> 5.1
What DAS28 score is indicative of remission?
< 2.6
A DAS28 score of 3.2-5.1 indicates what?
Moderate disease
A DAS28 score of 2.6-3.2 indicates what?
Low disease activity
What group of drugs are the main treatment for RA?
DMARDs
What can be used as adjunctive therapy for RA?
NSAIDs and steroids
Can steroids be used as sole therapy?
No
Oral steroids can be stopped suddenly. True or false?
False- patients must be taken off oral steroids by gradually reducing the dose
What is the first line DMARD?
Methotrexate
What is a good second line DMARD (especially in pregnancy)?
Sulphasalazine
What should always be started together with a DMARD? Why is this?
Steroids- because DMARDs take a few months to start to work, the steroid controls the inflammation in the meantime
Why are patients on DMARDs monitored?
Bone marrow suppression- low WCC
Why should patients on methotrexate be told to look out for a dry cough or dyspnoea?
It can cause pneumonitis
What advice would you give to young women starting methotrexate?
Use contraception- you cannot get pregnant on this drug
When can you give a biologic drug in RA?
If there has been a failure to respond to at least two DMARDs, and a DAS28 score of > 5.1
Should methotrexate be co-prescribed with a biologic?
Yes
What are 2 major risk factors of biologics?
- Immunosuppression
- Risk of reactivation of TB (patients should be screened)
What is the most common form of arthritis?
Osteoarthritis
Which arthritis is progressive and degenerative?
Osteoarthritis
What are 3 features of osteoarthritis?
- Gradual thinning of cartilage
- Loss of joint space
- Formation of bony spurs
When does osteoarthritis typically set in?
Around aged 40
Cartilage consists mainly of which type of collagen fibres?
Type II
What type of pain is found in osteoarthritis?
Mechanical pain
When is OA pain better and worse?
Worse on activity and by the end of the day
Better with rest
What type of arthritis causes crepitus?
Osteoarthritis
What type of arthritis causes morning stiffness for < 30 mins?
Osteoarthritis
‘One of the most common ares to be affected is the. neck’ describes what condition?
Osteoarthritis
What are Heberden’s nodes?
Bony enlargements in OA seen at the DIPs
What are Bouchard’s nodes?
Bony enlargements in OA seen at the PIPs
What will the affected areas of OA feel like?
Hard and lumpy
What is a Baker’s cyst?
An effusion in the knee spreads into the popliteal fossa and bulges out
What can a Baker’s cyst be misdiagnosed as?
DVT
What can lumbar spine OA cause if it impinges on the spinal cord?
Spinal stenosis
Osteoarthritis is more common in which gender?
Females
What are 5 risk factors for OA?
- Occupation
- Hobbies
- Previous Injury
- Obesity
- Co-morbidities
How do inflammatory markers come back usually in OA?
Normal