Steeple sign is seen in:
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 suppos a diagnosis of croup, usually caused by paramyxoviruses.
Croup
Acute epiglottitis
Laryngomalacia
Quinsy