Figure 13b. Acute diffuse pulmonary hemorrhage in a 53-year-old woman with systemic lupus erythematosus and massive hemoptysis. (a) High-resolution CT scan shows geographic areas of ground-glass attenuation with interlobular septal thickening. (b) Photomicrograph (original magnification, x250; hematoxylin-eosin stain) shows acute intraalveolar hemorrhage.