Brain magnetic resonance imaging of EGPA patients with central nervous system involvement. T1-weighted (a), T2 fluid-attenuated inversion recovery (Flair; b), T2 propeller (c), Diffusion-Weighted Images (d), and Apparent Diffusion Coefficient (e) show white matter lesions and multiple cerebral infarctions of Case 19; T1 Flair (f), T2 propeller (g) and T2*-weighted gradient-recalled echo (h) show intracerebral hemorrhages of Case 19. Another patient (Case 11) with hypertrophic cranial pachymeningitis (i) got alleviation of dural involvement after therapy (j). The images of T1 Flair (k) and T2 propeller (l) indicate the medulla oblongata involvement of one patient (Case 18). The corresponding lesions are indicated by the arrows.