Churg–Strauss syndrome


Eosinophilic granulomatosis with polyangiitis (EGPA)archaic eponym: Churg–Strauss syndrome (CSS) or allergic granulomatosis. The eponym ‘Churg-Strauss syndrome’ was replaced by ‘EGPA’ in part to achieve nomenclature symmetry with Microscopic Polyangiitis (MPA) and Granulomatosis with Polyangiitis (GPA, Wegener).

  • EGPA is eosinophil-rich, necrotizing granulomatous inflammation often involving the respiratory tract; with necrotizing vasculitis predominantly affecting small to medium vessels; and associated with asthma and eosinophilia
  • EGPA is a systemic small/medium vessel necrotizing vasculitis characterised by extravascular granulomas; eosinophilia; and eosinophilic tissue infiltration.
  • EGPA most often occurs in people with adult-onset asthma; allergic rhinitis and nasal polyps and the diagnosis confirmed on tissue biopsy. ANCA is more frequent when glomerulonephritis is present
  • Treatment is primarily with corticosteroids.


1951Churg and Strauss described 12 cases bearing a striking resemblance to GPA. However the cases demonstrated a marked eosinophilia and most of the patients were atopic they concluded that they were dealing with a new entity, which they entitled ‘allergic granulomatosis.

2012 – The Chapel Hill Consensus Conference (CHCC 2012) on the Nomenclature of Systemic Vasculitis, revised the classification of vasculitides and approved the transition name of ‘Eosinophilic Granulomatosis with Polyangiitis (Churg-Strauss)‘ prior to full recognition of ‘Eosinophilic granulomatosis with polyangiitis (EGPA)‘ as the official terminology

Associated Persons

Alternative names
  • Eosinophilic granulomatosis with polyangiitis (EGPA)
  • Allergic granulomatosis
  • Allergic granulomatous angiitis
  • Churg–Strauss syndrome


Chapel Hill Consensus Conference (CHCC 2012) provided a consensus for the use of descriptive wording to make nomenclature more consistent. ANCA-associated vasculitides include Microscopic Polyangiitis (MPA); Granulomatosis with Polyangiitis (GPA, Wegener); and Eosinophilic granulomatosis with polyangiitis (EGPA, Churg-Strauss). The polyangiitis is similar in all three conditions


eponymictionary CTA


the names behind the name

Doctor in Australia. Keen interest in internal medicine, medical education, and medical history.

Graduated from Southampton Medical School in 2017 with BMBS. Working in Sir Charles Gairdner Hospital Emergency Department in Perth, Australia.

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