Dyspnea and Cough DSA Flashcards
Granulomatosis with Polyangiitis (Wegener’s granulomatosis) is noted to have a triad of what 3 features?
URT disease
LRT disease
Glomerulonephritis
What is needed for Dx of Polyangiitis with Granulomatosis?
Tissue Bx
ANCAs
Triad
ANCAs of Polyangiitis with Granulomatosis are usually directed against…
Proteinase-3
What is the general pathologic features of Polyangiitis with Granulomatosis? (3)
Vasculitis of small aa., arterioles, and capillaries
Necrotizing granulomatous lesions of URT and LRT
GN
What is the patient demographic of Polyangiitis with Granulomatosis?
4-5th decades, M=F
Annual incidence of 12 per million
How long does it take for Polyangiitis with Granulomatosis to develop? What are some early presentations?
4-12 mo. with fever, malaise, weight loss.
DZs on DDx of Polyangiitis with Granulomatosis
PAN Microscopic polyangiitis Churg-Strauss Chronic sinusitis Goodpasture syndrome SLE Sarcoidosis Cocaine
What 2 lab tests should be ordered for Polyangiitis with Granulomatosis?
c-ANCA
- Abs to proteinase-3 (from neutrophil granules)
- High specificity (>90%)
- If Dz is active, c-ANCA will be high
p-ANCA
- Abs to myeloperoxidase
- Less specific than c-ANCA
- 10-25% w/ classic Polyangiitis with Granulomatosis have p-ANCA if kidney involvement is present
- Proteinuria
- Hematuria and casts
What imaging should be done for Polyangiitis with Granulomatosis?
Chest CT
ANCA is not enough to Dx Polyangiitis with Granulomatosis. What else is paramount?
Bx and histology
- vasculitis
- granulomatous inflammation
- acute/chronic inflammation
- renal Bx for crescents
What is the treatment for Polyangiitis with Granulomatosis is divided into two phases:
How is the therapy determined?
Induction of remission
Maintenance of remission
Determined on whether the pt. has a mild disease (no kidney involvement) vs. severe life/organ-threatening disease (RPGN, Pulm. hemorrhage, etc)
What is the prognosis of Polyangiitis with Granulomatosis without treatment?
What can be given as Tx? Do they work well?
Fatal usually within 1 year.
Cyclophosphamide and Prednisone.
Remissions have been in up to 75%, but half will suffer recurrences.
Churg-Strauss is vasculitis of:
What organ systems are affected?
Small and medium aa. in patients with asthmatic sx.
Skin, lung, maybe heart, GI, nerves.
Major clinical finding of Churg-Strauss:
What is seen on CXR?
*Peripheral eosinophilia
Lung opacities to nodules
What is seen on Bx to make a Dx of Churg-Strauss?
Fibrinoid necrotizing epithelioid and eosinophilic granulomas