Radiology Key

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…

Amyloidosis, Airways Melissa L. Rosado-de-Christenson, MD, FACR Key Facts Terminology Extracellular deposition of abnormal protein Localized tracheobronchial amyloidosis; rare but most frequent form of 1° pulmonary amyloidosis Imaging Findings CT/HRCT…

Tracheobronchopathia Osteochondroplastica Melissa L. Rosado-de-Christenson, MD, FACR Key Facts Terminology Multifocal submucosal osteocartilaginous nodules protruding into airway lumen Imaging Findings Multifocal calcified mural nodules of distal trachea and central bronchi…