Cystic Fibrosis Gerald F. Abbott, MD Key Facts Terminology Cystic fibrosis (CF): Hereditary disorder that affects gene regulating chloride transport Accounts for up to 25% of adult cases of bronchiectasis…

Allergic Bronchopulmonary Aspergillosis Gerald F. Abbott, MD Key Facts Terminology Chronic airway inflammation and injury from colonization and sensitization by Aspergillus fumigatus and related species Imaging Findings Central bronchiectasis and…

Bronchiectasis Jud W. Gurney, MD, FACR Key Facts Terminology Irreversible bronchial dilatation usually associated with inflammation of bronchial wall Imaging Findings ↑ Bronchoarterial ratio (signet-ring sign) B/A > 1 not…

Broncholithiasis Jud W. Gurney, MD, FACR Key Facts Terminology Calcified or ossified material within bronchial lumen, usually due to erosion from adjacent lymph nodes Imaging Findings Endobronchial or peribronchial calcified…

Endobronchial Tumor Jud W. Gurney, MD, FACR Key Facts Imaging Findings Air crescent around lesion should suggest endobronchial lesion (also seen with intracavitary lesions) Bronchus sign: Bronchus leading to peripheral…

Asthma Brian C. Allen, MD Tan-Lucien H. Mohammed, MD, FCCP Key Facts Terminology Reactive airway disease Intermittent reversible obstruction to air flow in lungs due to hyperreactivity and inflammation Imaging…

Saber-Sheath Trachea Aqeel A. Chowdhry, MD Tan-Lucien H. Mohammed, MD, FCCP Key Facts Terminology Trachea in which coronal dimension ≤ 2/3 of sagittal dimension Extrathoracic trachea normal Probably acquired deformity…

Tracheomegaly Martha Huller Maier, MD Key Facts Terminology Dilatation of trachea and central bronchi with relatively abrupt transition to normal caliber of peripheral airways Imaging Findings Trachea and 1st- through…

Tracheal Neoplasms Jud W. Gurney, MD, FACR Key Facts Terminology Rare malignant (90%) neoplasms of chest (0.1%), 2/3 either squamous cell carcinoma or adenoid cystic carcinoma Imaging Findings Proximal 1/2…

Tracheobronchomalacia Melissa L. Rosado-de-Christenson, MD, FACR Key Facts Terminology Excessive collapsibility of airway lumen Tracheomalacia = affects trachea Tracheobronchomalacia = affects trachea and bronchi Imaging Findings Chest radiographs may be…