MLA Rheumatology Flashcards
Which haplotypes are associated with rheumatoid arthritis?
HLA-DR4/DR1
Which modifiable risk factor increases disease severity in rheumatoid arthritis?
Smoking - increases citrullination
What is rheumatoid factor?
IgM Antibody directed against the Fc region of IgG
When is joint stiffness most prominent in rheumatoid arthritis?
In the morning (worse at rest and during periods of inactivity)
What are the most common sites affected by rheumatoid arthritis?
Metacarpophalangeal, proximal interphalangeal, metatarsophalangeal joints, followed by the wrists, knees, elbows, ankles, hips and shoulder
Which joints are spared in rheumatoid arthritis?
Distal interphalangeal joints
What is a swan-neck deformity?
Hyper-extension of the proximal interphalangeal joint (flexion of DIP)
Which rheumatoid deformity is associated with hyperflexion of the PIP joints?
Boutonniere deformity
Which syndrome describes a triad of splenomegaly, neutropenia and rheumatoid arthritis?
Felty Syndrome
Which serology is positive in RA?
Rheumatoid factor
Anti-CCP
Which autoantibody is most specific in RA?
Anti-CCP
What are the radiograph features of rheumatoid arthritis?
Periarticular erosions
Loss of joint space
Juxta-articular osteoporosis
Which score is used to assess disease severity in rheumatoid arthritis?
DAS-28
Prior to surgery in patients with RA, which immediate X-ray should be performed?
Ap and lateral cervical spine to screen for atlantoaxial subluxation
What is the first medical management for RA?
Disease-modifying drugs e.g., Methotrexate, sulfasalazine and azathioprine
What are the adverse effects associated with methotrexate?
Mucositis, myelosuppression, hepatotoxicity, pulmonary toxicity (hypersensitivity pneumonitis).
What should be co-prescribed with methotrexate?
Folic acid 5 mg (administered >24 hours since last methotrexate dose)
How long should methotrexate be discontinued for until conception?
Minimum 6 months
Which drug can interact with methotrexate and cause marrow aplasia?
trimethoprim/co-trimoxazole
What is the medical management for acute RA flares?
Short-term bridging with glucocorticoids
What is the preferred medical management until a rheumatoid appointment is available?
Low-dose NSAID with PPI cover
What is the indication to start biological DMARDs in RA?
inadequate response to >2 DMARDs
What are the preferred biological DMARDs in RA?
- Anakinra – IL-1
- Anti-TNF-alpha – Etanercept, infliximab, adalimumab
What investigation should be performed prior to starting biological therapy in RA?
CXR to screen for latent tuberculosis
What are the pulmonary complications associated with RA?
Interstitial lung disease, pleural effusion
What is the affected site associated with Heberden’s nodes?
Distal interphalangeal joint
Which node is associated with the proximal interphalangeal joint in osteoarthritis?
Bouchard’s nodes
What is the pain presentation associated with osteoarthritis?
- Activity-related joint pain
- NO morning joint-related stiffness or morning stiffness >30 minutes.
On palpation of joints in patients with osteoarthritis, what is commonly felt?
Crepitus
Which hand joints are most commonly affected in osteoarthritis?
First carpometacarpal joint at the base of the thumb
and
DIP/PIP
What fixed deformity of the thumb is observed in osteoarthritis?
Squaring
How is the severity if hip arthritis measured?
Oxford Hip Score
Which movement is affected in hip arthritis?
Painful restriction of internal rotation with hip flexion.
What is the main symptom of knee osteoarthritis?
Locking - inability to straighten the knee
What are the four radiological features observed in osteoarthritis?
- Loss of joint space
- Osteophytes
- Subchondral sclerosis
- Subchondral cysts
What is the first line medical management for osteoarthritis?
Topical 5% ibuprofen gel applied 3 times a day for knee OA
If topical therapy is ineffective in patients with osteoarthritis, what is the next line of management?
Oral NSAIDs e.g., ibuprofen, celecoxib
What is the definitive management of an osteoarthritis hip?
Total hip replacement
What is the most common reason for a total hip replacement revision?
Aseptic loosening
Which dislocation is most commonly associated with anosteoporotic hip?
Posterior dislocation
What are the risk factors for ankylosing spondylitis?
HLA-B27
Which joint is most affected in Ankylosing Spondylitis ?
Sacroiliac joints
What is the characterised stiffness presentation in Ankylosing Spondylitis ?
Prolonged morning back stiffness
Which movements are restricted in Ankylosing Spondylitis ?
Limited lumbar spine motion (lateral and forward flexion)
Reduced chest expansion
Which test is used to assess for lumbar spine motion in Ankylosing Spondylitis ?
Schober’s test
What type of respiratory dysfunction is associated with Ankylosing Spondylitis ?
Restrictive defect
What planar complication is associated with Ankylosing Spondylitis ?
Enthesitis (heel, plantar)
Tenderness at tendon insertion sites e.g., Achilles tendon and plantar fascia
What are the extra-articular complications associated with Ankylosing Spondylitis ?
- Apical fibrosis – detected on CXR.
- Anterior uveitis
- Aortic regurgitation and AV node block
- Achilles tenonitis
- Amyloidosis
- Peripheral arthritis
- Cauda equina syndrome
Which is the most useful investigation in patients with suspected Ankylosing spondylitis?
Plain X-ray of sacroiliac joins to assess for sacroillitis
What is a late and uncommon radiograph finding in Ankylosing spondylitis?
Bamboo spine
Which investigation is indicated to assess for respiratory complications in Ankylosing Spondylitis?
Spirometry
What is the first line management for Ankylosing spondylitis?
NSAIDs (lowest effective dose)
When are DMARDs indicated for ankylosing spondylitis?
For peripheral joint involvement
Which haplotype associated with psoriatic arthritis?
HLA-B27
What deformity is associated with psoriatic arthritis?
Mutilans - telescoping fingers
What is the characteristic radiograph finding observed in psoriatic arrthritis?
Pencil in cup deformity
What is the immediate management for suspected psoriatic arthritis?
Urgent referral to the rheumatologist - prescribe NSAIDs at the lowest effective dose
What is used to manage acute flares of psoriatic arthritis?
Steroids e.g., prednisolone
Which monoclonal antibodies are indicated for the management of psoriatic arthritis?
Ustekinumab and secukinumab (targets IL-17)
What is the triad of symptoms associated with reactive arthritis?
- Can’t pee: Urethritis, UTIs, STIs, circinate balanitis.
- Can’t see: Conjunctivitis, iritis, uveitis.
- Can’t bend my knee: Axial arthritis, asymmetrical oligoarthritis
- Can’t stand on my feet: Keratoderma blennorrhagica.
What are the commonest causes of reactive arthritis?
: 1-4 weeks following an enteric infection (e.g., Campylobacter, Salmonella, Shigella, Yersinia), a venereal infection (e.g., chlamydia) or a streptococcal sore throat.
What investigations are indicated for reactive arthritis?
- Bloods:
- CRP/ESR – raised
- WCC – raised
- Antibody testing – negative
- Joint aspiration – negative for crystals and bacteria.
What is the first line management for reactive arthritis?
NSAIDs, intra-articular steroids
Which autoantibodies are associated with Sjogren’s syndrome?
Anti-Ro and Anti-La
What are the characteristic features associated with Sjogren’s syndrome?
Dry mouth and dry eyes
Which sex is most affected in Sjogren’s syndrome?
Female:male predominance (9:1)
Which test is used to assess for wetting in Sjogren’s disease?
Schirmer’s test (,5 mm wetting per minute)
What is the serology testing in patients with Sjogren’s syndrome?
Anti-Ro and Anti-La
ANA
RF
What is the first line conservative management for Sjogren’s syndrome?
Artificial tears
Saliva substitute
Mouth Rinse
Pilocarpine
Which auto-antibody is associated with polymyositis?
Anti-Jo-1
What is the main clinical presentation of polymyositis?
Symmetric involvement of proximal girdle muscles (shoulder and pelvic muscles)
What respiratory complication is associated with polymyositis?
Interstitial lung disease
Which blood tests are raised in polymyositis?
Creatine kinase
ESR
LDH
What is the diagnostic investigation for polymyositis?
EMG-guided biopsy
What screen should be performed in polymyositis?
Malignancy screen - tumour markers, CXR, mammography
What is the first line management for polymyositis?
High-dose oral steroids