Vasculitis Flashcards
What is vasculitis?
Inflammation of blood vessels, with ischaemia, necrosis and organ inflammation
True or False
Vasculitis only affects arteries and veins
False.
Venules, arterioles and capillaries can all be affected too
What are the two types of vasculitis?
Primary and secondary
What can trigger secondary vasculitis?
Infection, drugs or a toxin
What is the pathogenesis of vasculitis?
Something causes dendritic cells to release cytokines which causes a cascade of WBC infiltration which leads to endothelial damage
How is vasculitis classified?
Large vessel,
medium vessel
ANCA-associated small vessel
immune complex small vessel
What is the classical presentation of vasculitis?
Depends very much on where it affects.
Fever, malaise, fatigue and weight loss are all common,
What are the common causes of large vessel vasculitis?
Giant cell arteritis
Takaysu arteritis
What condition has a link with giant cell arteritis?
Polymyalgia rheumatica
Who is more likely to develop Takaysu arteritis?
Females under 40.
More common in Asians
Where does giant cell arteritis affect?
Typically temporal arteries but can also be in aorta and other great vessels
What clinical findings may be present in large vessel vasculitis?
Bruit, especially at carotids
Blood pressure different at extremities
Claudication
Hypertension
What are the classical symptoms of temporal arteritis?
Jaw claudication
Unilateral, temporal headache
Prominent, non-pulsating temporal arteries.
What is the major concern with temporal arteritis?
risk of blindess due to ischaemia of optic nerve
What investigations would you do if you suspected TA?
Inflammatory markers -ESR, CRP, PV
MR angiogram
True or False
Temporal artery biopsy is the definitive investigation
False.
Skip lesions occur so a negative biopsy does not rule out TA