Radiology Key

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…

Relapsing Polychondritis Aqeel A. Chowdhry, MD Tan-Lucien H. Mohammed, MD, FCCP Key Facts Terminology Rare autoimmune episodic disorder that destroys cartilage, especially of ear, nose, and laryngotracheobronchial tree Imaging Findings…

Wegener Granulomatosis, Airways Melissa L. Rosado-de-Christenson, MD, FACR Key Facts Terminology Systemic necrotizing granulomatous vasculitis of small to medium-sized vessels May produce tracheobronchial stenosis Imaging Findings Tracheal wall thickening/stenosis Frequent…

Gravitational Gradients Jud W. Gurney, MD, FACR Terminology Definitions Distribution of disease not a random process but end result of interaction between pathologic process with its environment Gravity alters pulmonary…

Cross-Sectional Physiology Jud W. Gurney, MD, FACR Terminology Definitions Geometry of airways and arteries is important determinant of flow distribution Airway branching Asymmetric dichotomous pattern (each parent divides into 2…

Lymphatics Melissa L. Rosado-de-Christenson, MD, FACR Gerald F. Abbott, MD Terminology Abbreviations Secondary pulmonary lobule (SPL) Overview of Pulmonary Lymphatics Morphology Tubular structures forming vascular channels Complex network of vessels…