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Table 1 Churg–Strauss syndrome (The American College of Rheumatology 1990 diagnostic criteria [4])

From: An uncommon presentation of eosinophilic granulomatosis with polyangiitis: a case report

Asthma History of wheezing or diffuse high-pitched expiratory rhonchi
Eosinophilia Eosinophilia >10% on differential white blood cell count
Mono- or polyneuropathy Development of mononeuropathy, multiple mononeuropathies, or polyneuropathy (glove/stocking distribution) attributable to systemic vasculitis
Pulmonary infiltrates, non-fixed Migratory or transitory pulmonary infiltrates (not including fixed infiltrates) attributable to vasculitis
Paranasal sinus abnormality History of acute or chronic paranasal sinus pain or tenderness or radiographic opacification of the paranasal sinuses
Extravascular eosinophils Extravascular areas
  1. The presence of any four or more of the six criteria yields a sensitivity of 85% and a specificity of 99.7%.