Silhouette SignNone

The Silhouette Sign is a medical concept used in chest X-rays to help identify where lung problems are located. It refers to the way certain shapes or borders of organs like the heart, aorta, or diaphragm become unclear or "lost" when there's an abnormality, such as a pneumonia or mass, in adjacent lung tissue. Basically, when the edge of a organ isn’t visible because it blends with a nearby issue, it helps doctors pinpoint the affected area in the lung more precisely. This sign is a useful clue in diagnosing lung conditions based on imaging.