In radiographs, obliteration of anatomic borders between tissues of similar density in contact with one another defines the __________ sign.

Question

Quizplus · Accepted Answer

The silhouette sign refers to the loss of normal anatomic borders between tissues of similar density in contact with one another, which indicates the presence of pathology. This can occur when a lung lesion or fluid accumulation in the pleural space obscures the margin between lung tissue and adjacent structures such as the heart or diaphragm. The other choices (A, B, C) do not specifically refer to this radiographic finding.

In Radiographs, Obliteration of Anatomic Borders Between Tissues of Similar