000 Staphylococcus Aureus Pneumonia Staphylococcus Aureus S aureus bronchiolitis in a 32-year-old man with acquired immunodeficiency syndrome (AIDS). (a) High-resolution CT scan shows small peripheral centrilobular nodules and branching linear opacities, resulting in the tree-in-bud pattern. (b) Photomicrograph (original magnification, ×400; hematoxylin-eosin stain) shows inflammatory material composed of leukocytes filling the bronchiolar lumen (arrow).Rossi, SE et al Tree-in-Bud Pattern at Thin-Section CT of the Lungs: Radiologic-Pathologic Overview RadioGraphicsVol. 25, No. 3 2005 Cavitating Pneumonia with Staph AureusAshley DAvidoff MD TheCommonVein.net cavitating pneumonia 59M 02 Cavitating Pneumonia with Staph AureusAshley Davidoff MD TheCommonVein.net cavitating pneumonia 59M