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	<title>List of radiologic signs - Revision history</title>
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		<summary type="html">&lt;p&gt;CSV import&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;&amp;#039;&amp;#039;&amp;#039;List of Radiologic Signs&amp;#039;&amp;#039;&amp;#039;&lt;br /&gt;
&lt;br /&gt;
Radiologic signs are specific patterns or findings seen on [[medical imaging]] studies, including [[X-ray]], [[Computed Tomography (CT)]], [[Magnetic Resonance Imaging (MRI)]], and [[Ultrasound (US)]], which suggest a particular diagnosis. These signs are named after their discoverers or because of the resemblance to objects or patterns familiar to the observer. Understanding these signs is crucial for radiologists and other medical professionals in diagnosing diseases. This article lists some of the most well-known radiologic signs, their imaging modality of preference, and the conditions they are associated with.&lt;br /&gt;
&lt;br /&gt;
==Apple Core Sign==&lt;br /&gt;
The Apple Core Sign is typically observed in [[barium enema]] examinations of the [[colon]]. It suggests the presence of a [[colorectal cancer]] that has caused a constriction of the lumen, resembling the shape of an apple core. &lt;br /&gt;
&lt;br /&gt;
[[Category:Radiology]]&lt;br /&gt;
&lt;br /&gt;
==Bird Beak Sign==&lt;br /&gt;
Seen in [[esophagram]] studies using barium swallow, the Bird Beak Sign indicates [[achalasia]], a condition where the lower [[esophageal sphincter]] fails to relax properly, leading to a narrowed distal esophagus and a beak-like appearance.&lt;br /&gt;
&lt;br /&gt;
[[Category:Radiology]]&lt;br /&gt;
&lt;br /&gt;
==Cotton Wool Spots==&lt;br /&gt;
Cotton Wool Spots are fluffy, white patches seen on [[fundoscopy]], indicative of localized [[retinal]] ischemia. They are associated with various conditions, including [[hypertensive retinopathy]], [[diabetic retinopathy]], and [[HIV retinopathy]].&lt;br /&gt;
&lt;br /&gt;
[[Category:Ophthalmology]]&lt;br /&gt;
&lt;br /&gt;
==Double Bubble Sign==&lt;br /&gt;
The Double Bubble Sign is observed on prenatal [[ultrasound]] or neonatal [[X-ray]] and suggests [[duodenal atresia]], where a blockage in the [[duodenum]] causes two distinct air-filled spaces; one in the stomach and another in the proximal duodenum.&lt;br /&gt;
&lt;br /&gt;
[[Category:Pediatric Radiology]]&lt;br /&gt;
&lt;br /&gt;
==Eggshell Calcification==&lt;br /&gt;
Eggshell Calcification is seen on [[chest X-ray]] or [[CT scan]] of the chest, characterized by a thin, calcified rim surrounding a [[lymph node]] or mass. It is most commonly associated with [[silicosis]] and [[sarcoidosis]].&lt;br /&gt;
&lt;br /&gt;
[[Category:Radiology]]&lt;br /&gt;
&lt;br /&gt;
==Halo Sign==&lt;br /&gt;
In [[Computed Tomography (CT)]] scans of the chest, the Halo Sign indicates a perimeter of ground-glass opacity surrounding a pulmonary nodule or mass, suggestive of invasive [[fungal infection]]s, particularly in immunocompromised patients.&lt;br /&gt;
&lt;br /&gt;
[[Category:Radiology]]&lt;br /&gt;
&lt;br /&gt;
==Honeycombing==&lt;br /&gt;
Honeycombing is a pattern seen on [[CT scan]] of the chest, characterized by cystic spaces with well-defined walls, resembling a honeycomb. It is indicative of end-stage [[pulmonary fibrosis]].&lt;br /&gt;
&lt;br /&gt;
[[Category:Radiology]]&lt;br /&gt;
&lt;br /&gt;
==String of Pearls Sign==&lt;br /&gt;
The String of Pearls Sign is observed in [[MRI]] of the abdomen and suggests [[small bowel obstruction]], where multiple dilated loops of bowel with fluid levels resemble a string of pearls.&lt;br /&gt;
&lt;br /&gt;
[[Category:Radiology]]&lt;br /&gt;
&lt;br /&gt;
==Sunburst Sign==&lt;br /&gt;
The Sunburst Sign can be seen on [[X-ray]] or [[CT scan]] of the bone, indicating aggressive bone formation in response to conditions like [[osteosarcoma]].&lt;br /&gt;
&lt;br /&gt;
[[Category:Radiology]]&lt;br /&gt;
&lt;br /&gt;
==Tram Track Sign==&lt;br /&gt;
Tram Track Sign is observed in [[CT scan]] or [[MRI]] of the brain, indicative of [[cerebral calcifications]] seen in conditions such as [[Sturge-Weber syndrome]].&lt;br /&gt;
&lt;br /&gt;
[[Category:Neuroradiology]]&lt;br /&gt;
&lt;br /&gt;
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		<author><name>Prab</name></author>
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