Images corresponding to illustrative case 3 (missed parasitic disease). (A) Chest CT scan demonstrating bilateral diffuse ground-glass opacities and a superimposed cavitary lesion/abscess in the left lower lobe. (B) Sections of the duodenum (original magnification ×10) with hematoxylin and eosin stain showing obliteration of the inner mucosa by S stercoralis larvae (arrows).