Question:medium
In given x-ray which of the following sign is seen:
In given x-ray which of the following sign is seen:
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Two concentric rings on one plain film = the double-ring (double-wall) sign.
Updated On: Jun 22, 2026
- Double ring sign
- String sign
- Steeple sign
- Thumb sign
Show Solution
The Correct Option is A
Solution and Explanation
Tackle this as pure pattern-recognition of named radiological signs.
First describe what is actually visible: on this radiograph a structure is outlined by air on more than one surface, giving two concentric rings - one ring inside another. The named sign for two concentric lucent rings on a single radiograph is the double ring (double-wall) sign.
Now keep each named sign tied to its home disease and modality, and only one will fit a plain radiograph showing concentric rings:
- Double ring sign $\rightarrow$ two concentric rings on a plain film (e.g. free intraperitoneal air outlining both walls of bowel, the Rigler appearance). This is what is shown.
- String sign $\rightarrow$ a barium contrast study, not a plain x-ray: a hair-thin contrast line through a narrowed lumen in Crohn disease or pyloric stenosis.
- Steeple sign $\rightarrow$ AP soft-tissue neck film in croup, with the trachea narrowing to a church-spire point.
- Thumb sign $\rightarrow$ lateral neck film in epiglottitis, with the swollen epiglottis shaped like a thumb.
Since the picture shows concentric rings on a single radiograph and not airway narrowing or a contrast column, the only consistent answer is the Double ring sign (option 1).
First describe what is actually visible: on this radiograph a structure is outlined by air on more than one surface, giving two concentric rings - one ring inside another. The named sign for two concentric lucent rings on a single radiograph is the double ring (double-wall) sign.
Now keep each named sign tied to its home disease and modality, and only one will fit a plain radiograph showing concentric rings:
- Double ring sign $\rightarrow$ two concentric rings on a plain film (e.g. free intraperitoneal air outlining both walls of bowel, the Rigler appearance). This is what is shown.
- String sign $\rightarrow$ a barium contrast study, not a plain x-ray: a hair-thin contrast line through a narrowed lumen in Crohn disease or pyloric stenosis.
- Steeple sign $\rightarrow$ AP soft-tissue neck film in croup, with the trachea narrowing to a church-spire point.
- Thumb sign $\rightarrow$ lateral neck film in epiglottitis, with the swollen epiglottis shaped like a thumb.
Since the picture shows concentric rings on a single radiograph and not airway narrowing or a contrast column, the only consistent answer is the Double ring sign (option 1).
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