In radiology, the steeple sign is a radiologic sign found on a frontal neck radiograph where subglottic tracheal narrowing produces the shape of a church steeple within the trachea itself. The presence of the steeple sign supports a diagnosis of croup, usually caused by paramyxoviruses.
In radiology, the steeple sign is a notable radiologic indicator appearing on frontal neck X-rays as a result of tracheal narrowing resembling a church steeple. The presence of this sign supports a diagnosis of croup, usually triggered by paramyxoviruses.