The term “extrapleural” refers to structures or spaces located outside the pleural cavity but adjacent to it. It typically describes the region between the inner surface of the chest wall and the parietal pleura.
Etymology:
Derived from Latin “extra-” meaning outside, and “pleura,” the membrane surrounding the lungs and lining the chest cavity.
TCV adjectives it applies to:
Position: Outside the pleural cavity, adjacent to the chest wall or diaphragm.
Character: Distinct from intrapleural or pleural structures, often associated with fat, connective tissue, or musculature.
Modality:
Seen in chest X-ray, CT, and MRI, particularly when evaluating masses, fluid collections, or thickening in the extrapleural region.
What does it imply:
Normal: The extrapleural space is typically occupied by fat and connective tissue.
Abnormal: Findings in the extrapleural space may indicate:
Extrapleural hematoma (e.g., trauma or surgery-related).
Neoplasms, such as mesothelioma or metastases.
Extrapleural fat hypertrophy, often benign but occasionally mimicking disease.
