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Pathology

Affects small to medium sized vessels. 
Necrotising granuloma affecting vessels of lungs, GI tract and peripheral nerves

Aetiology

Associated with pANCA

Signs

3 distinct stages
1. Sinusitis and onset of allergies
2. Onset of acute asthma
3. Systemic involvement: skin purpura, GI upset, peripheral neuropathy.

Symptoms

Chest tightness, wheeze, Shortness of breath, sinusitis

Investigations

Bloods: FBC shows eosinophilia, pANCA, CRP and ESR
Imaging: Chest X-ray shows eosinophilic lung deposits.

Treatment

Medical: Steroids, immunosuppression

Prognosis

Poor prognosis and end organ damage 
Glomerulonephritis, vasculitis

Key Facts

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Key Images

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Key References

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