A delayed diagnosis of eosinophilic granulomatosis with polyangiitis complicated with extensive artery occlusion of lower extremities in children: case report and literature review

a: The chest CT scan showed that a change of ground-glass opacities and nodule was found on the middle lobe of the right lung (red arrow) b: Skin lesion presenting as purpura in lower limbs (red arrow), and an ulceration with purulent exudate, sized 3？cm * 4？cm in the left leg (triangle), c-d: The CTA of lower extremities showed extensive stenosis and/or occlusion of shank and foot arteries (red arrow