Snapshot A 40-year-old woman presents to the emergency room for fever and cough for the past few nights. Her past medical history includes systemic lupus erythematosus, for which she is currently on a long prednisone taper. On physical exam, she is in moderate distress and dyspneic. There are bilateral crackles and rhonchi on pulmonary exam. A chest radiograph shows multifocal consolidation. She is started on antibiotics following a bronchoalveolar lavage. Introduction Classification login to view 7 more bullets Associated conditions login to view 4 more bullets Epidemiology Demographics login to view 1 more bullet Location login to view 2 more bullets Risk factors login to view 4 more bullets ETIOLOGY Pathogenesis login to view 2 more bullets Presentation Symptoms login to view 3 more bullets Physical exam login to view 14 more bullets Imaging Chest radiography login to view 5 more bullets Computed tomography (CT) of the brain login to view 4 more bullets Studies Labs login to view 4 more bullets Making the diagnosis login to view 1 more bullet Differential Actinomyces infection login to view 4 more bullets Tuberculosis login to view 2 more bullets Treatment Medical login to view 6 more bullets Complications Disseminated infection