Metastases Melissa L. Rosado-de-Christenson, MD, FACR Key Facts Terminology Lung most common site of metastases Pathways: Hematogenous, lymphatic, endobronchial Imaging Findings Multifocal bilateral pulmonary nodules Peripheral, basilar predominant Variable size…

Hepatopulmonary Syndrome Jud W. Gurney, MD, FACR Key Facts Terminology Triad characterized by Chronic liver disease (usually cirrhosis) Increased alveolar-arterial oxygen gradient on room air (> 15 mmHg) Intrapulmonary vascular…

Pulmonary Capillary Hemangiomatosis Jud W. Gurney, MD, FACR Key Facts Terminology Rare cause of pulmonary hypertension due to proliferation of alveolar capillaries within lung Imaging Findings Enlarged pulmonary arteries +…

Community Acquired Pneumonia Jud W. Gurney, MD, FACR Key Facts Imaging Findings Best diagnostic clue: Focal parenchymal abnormality in patient with fever If initial radiograph normal in patient strongly suspected…

Diffuse Interstitial Pneumonitis Tan-Lucien H. Mohammed, MD, FCCP Jud W. Gurney, MD, FACR Key Facts Terminology Chronic idiopathic interstitial pneumonia characterized by macrophage filling of alveolar spaces, probably related to…

Septic Emboli Aqeel A. Chowdhry, MD Tan-Lucien H. Mohammed, MD, FCCP Key Facts Terminology Septic embolism occurs when infected purulent material is dislodged and embolizes to lung Imaging Findings Nodules…

Bronchial Atresia Jud W. Gurney, MD, FACR Key Facts Terminology Congenital atresia of segmental bronchus with normal distal architecture Imaging Findings Apicoposterior segment left upper lobe (50%), followed by right…

Tuberculosis, Post-Primary Helen T. Winer-Muram, MD Key Facts Imaging Findings Rim-enhancing enlarged mediastinal lymph nodes Consolidation (100%) Lobular size and peribronchial Cavitation (50%) Wall thickness variable: Thick > thin, shape…

Aspergillosis, Angioinvasive Helen T. Winer-Muram, MD Key Facts Terminology Invasive aspergillosis: Tissue invasion either angioinvasive or airway invasive, typically occurs in patients with neutropenia or impaired neutrophil function Imaging Findings…

Pneumocystis, Jiroveci Pneumonia Jud W. Gurney, MD, FACR Key Facts Terminology Opportunistic fungal infection often affecting individuals with T-cell immunodeficiency Imaging Findings Ground-glass is dominant finding; opacities symmetric and diffuse…