What is a stable cardiomediastinal silhouette?

A stable cardiomediastinal silhouette refers to the consistent appearance of the heart and mediastinal structures on imaging, such as chest X-rays or CT scans, indicating no significant changes or new pathologies over time. This stability suggests that there are no acute conditions, such as enlargement of the heart or new masses in the mediastinum, which could indicate underlying disease. Radiologists often use this term to describe findings in follow-up studies, reassuring that the cardiac and mediastinal structures remain normal and unchanged.