- “Allergic Granulomatosis”
- Three clinical phases
- Prodrome (allergic rhinitis, asthma, eosinophilia)
- Vasculitis (arthritis, myositis, cardiac, pulmonary, NS, GI, renal, ocular, GU)
- Post-vasculitic phase (allergic rhinitis, asthma, HTN from renal damage, peripheral nerve damage)
- Skin lesions: palpable purpura & nodules, retiform purpura, most common in the 2nd phase
Course and Treatment
- Peripheral eosinophilia >10-20%
- Mononeuritis multiplex is highly associated
- Leukotriene-inhibitors unmasking - some reports
- Many cases go undiagnosed until 2nd phase
- CHF is most common cause of death in the untreated
- Corticosteroids may be used alone
- Add cyclophosphamide for refractory cases
- Maintenance: MTX
- Rituximab
- Mepolizumab (anti-IL5 monoclonal antibody)