VASCULITIS Flashcards
What is vasculitis?
Inflammation of the blood vessels
Chapel Hill consensus definition of vasculitis?
Large vessel - Takayasu + GCA
Medium - PAN + Kawasaki
Small: ANCA-associated and immune-complex-associated
ANCA-associated vasculitis?
Microscopic polyangitis
Granulomatosis with polyangitis
Eosinophilic granulomatosis with polyangitis
Immune-complex-associated vasculitis?
Anti-GBM disease
Cryoglobulinaemic vasculitis
IgA vasculitis/HSP
Hypocomplementemic urticaria vasculitis (anti-C1q)
Examples of medium vessel vasculitis?
Polyarteritis nodosa
Kawasaki disease
Examples of large vessel vasculitis?
Giant cell arthritis
Takayasu’s arteritis
What is granulomatosis with polyangiitis also known as?
Wegeners granulomatosis
What is Eosinophilic granulomatosis with polyangiitis also known as?
Churg-Strauss syndrome
What is anti-glomerular basement membrane disease also known as?
Goodpastures syndrome
Which ANCA type is associated with granulomatosis with polyangiitis?
cANCA
Which ANCA type is associated with Eosinophilic granulomatosis with polyangiitis?
pANCA
Most commonly targeted protein in granulomatosis with polyangiitis?
Serine proteinase 3 (PR3)
Most commonly targeted protein in Eosinophilic granulomatosis with polyangiitis?
MPO
Conditions associated with cANCA?
Granulomatosis with polyangiiitis
40% of microscopic polyangiitis
Conditions associated with pANCA?
75% of microscopic polyangiitis
50% of Eosinophilic granulomatosis with polyangiitis
25% of granulomatosis with polyangiitis
70% of UC
70% of PSC
25% of anti-GBM disease
20% of Crohn’s disease
Features of granulomatosis with polyangiitis?
- upper respiratory tract: epistaxis, chronic sinusitis, nasal crusting, saddle-shape nose deformity
- lower respiratory tract: dyspnoea, haemoptysis, cough, wheeze, cavitating lesions
- rapidly progressive glomerulonephritis (pauci-immune)
also: vasculitic rash, eye involvement (e.g. proptosis), ear involvement (e.g. hearing loss), cranial nerve lesions, constitutional symptoms
Why does granulomatosis with polyangiitis cause a saddle nose deformity?
As it causes progressive loss of the cartilage in the nose
Investigtaions for granulomatosis with polyangiitis?
Urinalysis
FBC - anaemic, leukocytosis and thrombocytosis, raised CRP and ESR
ANCA antibodies - cANCA positive in >90% and pANCA positive in 25%
CXR - cavitating lesions, nodules, infiltrates
Renal biopsy - epithelial crescents in bowman’s capsule
Management of granulomatosis with polyangiitis?
steroids
cyclophosphamide (90% response)
plasma exchange
Prognosis of Granulomatosis with polyangiitis?
Median survival is 8-9 years
Clinical presentation of Eosinophilic granulomatosis with polyangiitis?
Severe, adult-onset asthma
Paranasal sinusitis
Mononeuritis multiplex
Vasculitis rash
Muscle and joint pain
Investigtaions for Eosinophilic granulomatosis with polyangiitis?
FBC - blood eosinophilia (>10%), anaemia, raised CRP and ESR
Serum ANCA - pANCA positive
Investigtaions for microscopic polyangitis?
ANCA - 75% have pANCA And 40% have cANCA
Renal biopsy - shows necrotising glomerulonephritis
Presentation of microscopic polyangiitis?
Renal failure due to glomerulonephritis
Vasculitis rash
Diffuse alveolar haemorrhage = haemoptysis
Mononeuritis multiplex
And constitutional symptoms
What is a vasculitic rash?
Palpable purpura
What is Henoch-schonlein purpura?
An IgA mediated small vessel vasculitis
Inflammation occurs due to IgA deposits in blood vessels
Who is HSP usually seen in?
Children under 10 following an infection (usually a viral RTI)
Presentation of HSP?
Palpable purpuric rash over buttocks and extensor surfaces of arms and legs - in 100%!
Abdominal pain that is severe and colicky
Polyarthritis
Features of IgA nephropathy e.g. haematuria or renal failure
Investigtaions for HSP?
Urinalysis - check for haematoproteinuria
BP - may be elevated in nephrotic syndrome
FBC
ESR&CRP raised
U&Es - elevated cr if renal involvement
Skin or renal biopsy can be performed for immunofluroresnece of IgA/C3 but this is rarely done!
Management of HSP?
Supportive & Analgesia for arthralgia