MSK/Rheumatology Flashcards
OSTEOARTHRITIS
What is osteoarthritis (OA)?
What causes it?
- Degenerative joint disorder with loss of hyaline cartilage “wear and tear”
- Primary (no underlying cause) or secondary to joint trauma or obesity
OSTEOARTHRITIS
What joints does OA tend to affect?
What symptoms might a patient complain of?
- Large weight bearing (hip, knee), also carpometocarpal joints, DIP/PIPJs
- Morning stiffness <30m + stiffness after rest
- Joint pain which is exacerbated on movement
OSTEOARTHRITIS
What are some examination signs of OA?
- Deformity = squaring of thumb (carpometacarpal joint of thumb), Bouchard nodes (PIPJ swelling) + Heberden nodes (DIPJ swelling)
- Decreased range of movement
OSTEOARTHRITIS
What investigation would you do in suspected OA and what would you expect to see?
Joint x-ray shows LOSS –
- Loss of joint space
- Osteophytes
- Subchondral cysts
- Subchondral sclerosis
OSTEOARTHRITIS
What is the conservative management of OA?
- Weight loss
- Aerobic exercises for muscle strengthening (avoid weight-bearing)
- Physio/OT
OSTEOARTHRITIS
What is the stepwise medical management of OA?
- First line = paracetamol + topical NSAID gel
- Second line = PO NSAIDs (+ PPI) or weak then stronger opioids
- Intra-articular steroid injections
OSTEOARTHRITIS
After medical management, how might you manage OA?
- Surgical = arthroplasty (joint replacement), arthroscopy (loose bodies), fusion
RHEUMATOID ARTHRITIS
What is rheumatoid arthritis (RA)?
What is the epidemiology?
- Autoimmune inflammatory synovial joint disease commonly presenting with a symmetrical distal polyarthropathy affecting small joints
- F>M, peak onset 40–60s
RHEUMATOID ARTHRITIS
What joints does RA tend to affect?
What symptoms might a patient complain of?
- Small joints in hands + feet, almost NEVER DIPJs
- Early morning stiffness >30m which improves with use
- Swollen, painful joints in hands + feet
- Systemically unwell (fatigue, flu-like illness)
RHEUMATOID ARTHRITIS
What are some examination signs of RA?
- Swollen, red, warm + tender joints
- Ulnar deviation of fingers at the MCPJs
- Z-shaped deformity of thumb
- Boutonnière thumb = hyperextended DIPJ, flexed PIPJ
- Swan-neck deformity = hyperextended PIPJ, flexed DIPJ
RHEUMATOID ARTHRITIS
What are some extra-articular manifestations of RA?
- Eyes = keratoconjunctivitis sicca #1, (epi)scleritis, corneal ulceration
- Neuro = carpal tunnel syndrome
- Resp = pulmonary fibrosis, pleural effusion, nodules
- Cardio = pericardial effusion, IHD
- Felty syndrome = RA + splenomegaly + low WCC
RHEUMATOID ARTHRITIS
A patient with known RA presents with neck pain, weakness and loss of sensation in the arms. What has happened?
- Atlanto-axial joint subluxation
RHEUMATOID ARTHRITIS
What investigations would you do in RA?
- FBC = anaemia of chronic disease
- Raised CRP/ESR
- Serum Ab = rheumatoid factor (IgM) first-line but anti-CCP if negative as more specific
- XR of hands + feet
RHEUMATOID ARTHRITIS
What does an xray show in RA?
LESS –
- Loss of joint space
- Erosions (periarticular)
- Soft tissue swelling
- Soft bone (periarticular osteoporosis) + Subluxation
RHEUMATOID ARTHRITIS
What are some poor prognostic markers in RA?
- RF
- Anti-CCP
- XR showing early erosions
- Extra-articular signs
RHEUMATOID ARTHRITIS
What is the mainstay of management for RA?
Give some examples
- Disease modifying antirheumatic drugs (DMARDs)
- Methotrexate, leflunomide, sulfasalazine + hydroxychloroquine
RHEUMATOID ARTHRITIS How is methotrexate prescribed? Does it require monitoring? What drugs should be avoided and why? What are some side effects?
- Once weekly, 5mg folic acid on separate day
- Regular FBC, U&E, LFTs baseline, weekly, 3/12
- Trimethoprim + co-trimoxazole as risk of marrow aplasia
- Myelosuppression, liver/pulmonary fibrosis, teratogenic (M+F stop 6m prior to conception)
RHEUMATOID ARTHRITIS
What are some side effects of…
i) leflunomide?
ii) sulfasalazine?
iii) hydroxychloroquine?
i) HTN, peripheral neuropathy
ii) Rashes, oligospermia
iii) Retinopathy (reduced vision), nightmares
RHEUMATOID ARTHRITIS
What more advanced treatments may be used in RA management and what are some side effects of them?
- TNF-alpha inhibitors (infliximab, adalimumab, etanercept) = severe infections, reactivation of TB
- Rituximab (monoclonal Ab to CD20) = night sweats + thrombocytopaenia
RHEUMATOID ARTHRITIS
What is the stepwise management of RA?
- 1st = DMARD monotherapy ± short course of bridging prednisolone
- 2nd = 2 DMARDs in combination
- 3rd = Methotrexate PLUS TNF-alpha inhibitor
- 4th = Methotrexate PLUS rituximab
RHEUMATOID ARTHRITIS
How do you manage a flare of RA?
How does NICE recommend you assess response to RA management?
What other options might you consider in RA management?
- PO/IM corticosteroids
- CRP + disease activity (DAS28 score)
- Analgesia (NSAIDs), physiotherapy + surgery
GOUT
What is gout?
- Inflammatory arthritis caused by hyperuricaemia (>0.45) + intra-articular deposition of monosodium urate crystals
GOUT
What are the two broad aetiologies of gout and some examples for each?
- Increased uric acid production = myelo- + lymphoproliferative disorders, chemotherapy, severe psoriasis
- Decreased uric acid excretion = diuretics, renal impairment, alcohol excess
GOUT
What are some potential triggers of a gout episode?
What are some risk factors for gout?
- Seafood/protein binges, chemo, trauma + surgery
- Men, obesity, CKD, DM, medications (diuretics, ACEi)