Musculoskeletal/Rheumatology Flashcards
Give 3 causes of inflammatory joint pain.
- Autoimmune disease, e.g. RA, vasculitis, connective tissue disease
- Crystal arthritis
- Infection
Give 2 causes of non-inflammatory joint pain.
- Degenerative, e.g. osteoarthritis.
- Non-degenerative, e.g. fibromyalgia
What are the 5 cardinal signs of inflammation?
- Rubor (redness)
- Calor (heat)
- Dolor (pain)
- Tumor (swelling)
- Loss of function
How does inflammatory pain differ from degenerative non-inflammatory pain? Are you more likely to see swelling in inflammatory or degenerative pain?
- Inflammatory pain tends to ease with use whereas degenerative pain increased with use
- In inflammatory pain you are likely to see synovial swelling. There is often no swelling in degenerative pain
Name 2 inflammatory markers that can be detected in blood tests.
- ESR (erythrocyte sedimentation rate)
- CRP
Explain why ESR levels are raised in someone with inflammatory joint pain.
Inflammation leads to increased fibrinogen which means the RBC’s clump together. The RBC’s therefore fall faster and so you have an increased ESR
Explain why CRP levels are raised in someone with inflammatory joint pain.
Inflammation leads to increased levels of IL-6. CRP is produced by the liver in response to IL-6 and therefore is raised
What is vasculitis? How is vasculitides categorised? Name some diseases in each category.
- Vasculitis = group of autoimmune diseases that cause inflammation of blood vessels
- Vasculitides can be categorised blood vessel size: small, medium, large
- Large vessel vasculitis: Giant cell arteritis, Takayasu’s arteritis
- Medium vessel vasculitis: Polyarteritis nodosa, Kawasaki disease
- Small vessel vasculitis: Henoch-Schonlein purpura, Granulomatosis with polyangiitis (Wegener’s granulomatosis)
- EOSINOPHILIC GRANULOMATOSIS WITH POLYANGIITIS CAN BE SMALL OR MEDIUM VESSEL VASCULITIS
- Variable vessel vasculitis = Behcet’s disease

What is the pathophysiology of Giant cell arteritis?
- Affects aorta and/or its major branches (carotid and vertebral branches)
- Temporal artery often involved (temporal arteritis)
What are the risk factors for Giant cell arteritis?
- Almost exclusively in >50 year olds
- Northern European
- Female
- Hx of polymyalgia rheumatica
What is the clinical presentation of Giant cell arteritis?
- HEADACHE - new onset, typically unilateral over temporal area
- Scalp tenderness
- Jaw claudication
- Visual disturbances: blurred vision, diplopia
What are the investigations for Giant cell arteritis?
- Increased ESR and/or CRP (=highly sensitive) ESR >50mm/hr
- Halo sign on ultrasound of temporal and axillary artery
- TEMPORAL ARTERY BIOPSY = GOLD STANDARD (show multinucleate giant cells, granulomatous inflammation)
Describe the management for Giant cell arteritis.
High dose glucocorticoid ASAP - usually prednisolone 40-60mg
What are the complications of Giant cell arteritis?
- Blindness
- Irreversible neuropathy
What is the pathophysiology and epidemiology of Takayasu’s arteritis?
- Pathophysiology: mainly affects aorta and its branches, also affects pulmonary branches
- Epidemiology: <40 years, Asian, female
What is the clinical presentation of Takayasu’s arteritis?
- PULSELESS DISEASE (difficulty in detecting peripheral pulse due to narrowing)
- Arm claudication
- Syncope
- Non-specific symptoms: fever, malaise, muscle aches
What are the investigations for Takayasu’s disease?
- CT angiography = GOLD STANDARD
- Granulomatous inflammation on histology
- Elevated ESR and CRP
Describe the management for Takayasu’s arteritis. What are the complications?
- Management: prednisolone
- Complications: aortic aneurysms
What is the epidemiology of Polyarteritis nodosa?
- Associated with hepatitis B
- More common in developing countries
- Affects all ages, all racial groups, no sex predominance
What is the presentation of Polyarteritis nodosa?
- CUTANEOUS/SUBCUTANEOUS NODULES (hallmark feature)
- UNILATERAL ORCHITIS (characteristic feature)
- Peripheral neuropathy - mononeuritis multiplex
- Livedo reticularis
- HTN
- Abdominal pain
What are the investigations for Polyarteritis nodosa?
- Increased ESR and/or CRP
- HBsAg
- Biopsy: shows transmural fibroid necrosis
Describe the management for Polyarteritis nodosa.
- If Hep B negative - corticosteroids + cyclophosphamide
- If Hep B positive - antiviral agent, plasma exchange and corticosteroids
What are the complications of Polyarteritis nodosa?
- GI perforation and haemorrhages
- Arthritis
- Renal infarcts
- Strokes
- MI
What is the pathophysiology of Kawasaki disease?
- Arteritis associated with mucocutaneous lymph nodes
- Acute and self-limited
- Usually affects coronary arteries
































































