Caterpillar sign (pyloric stenosis)
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The caterpillar signis a radiological sign described in pyloric stenosis.
It refers to the appearance of stomach on an upper gastrointestinal radiographic series or plain abdominal radiograph 1,2. On these imaging modalities in a patient with pyloric stenosis, the stomach appears as distended, air-filled and with wave-like contours, resembling the appearance of a caterpillar 1,2.
This sign is produced when the gastric hyperperistaltic waves present in this condition come to an abrupt stop at the pylorus 1,2. It is the radiographic correlate of the visible peristaltic waves that may be appreciated clinically in the left upper quadrant and epigastrium of the abdomen 1,2.
-<p>The <strong>caterpillar sign</strong><strong> </strong>is a radiological sign described in <a href="/articles/pyloric-stenosis">pyloric stenosis</a>.</p><p>It refers to the appearance of stomach on an upper gastrointestinal radiographic series or plain abdominal radiograph <sup>1,2</sup>. On these imaging modalities in <a title="Pyloric stenosis" href="/articles/pyloric-stenosis">pyloric stenosis</a>, the stomach appears as distended, air-filled and with wave-like contours, resembling the appearance of a caterpillar <sup>1,2</sup>. </p><p>This sign is produced when the hyperperistaltic waves present in this condition come to an abrupt stop at the pylorus <sup>1,2</sup>. It is the radiographic correlate of peristaltic waves that may be appreciated clinically in the left upper quadrant and epigastrium of the abdomen <sup>1,2</sup>.</p>- +<p>The <strong>caterpillar sign</strong><strong> </strong>is a radiological sign described in <a href="/articles/pyloric-stenosis">pyloric stenosis</a>.</p><p>It refers to the appearance of stomach on an upper gastrointestinal radiographic series or plain abdominal radiograph <sup>1,2</sup>. On these imaging modalities in a patient with <a href="/articles/pyloric-stenosis">pyloric stenosis</a>, the stomach appears distended, air-filled and with wave-like contours, resembling the appearance of a caterpillar <sup>1,2</sup>. </p><p>This sign is produced when the gastric hyperperistaltic waves come to an abrupt stop at the pylorus <sup>1,2</sup>. It is the radiographic correlate of the visible peristaltic waves that may be appreciated clinically in the left upper quadrant and epigastrium of the abdomen <sup>1,2</sup>.</p>
References changed:
- 1. Martinez-Leo B, Garcia-Cabello LM. Caterpillar Sign in Infantile Hypertrophic Pyloric Stenosis. The New England journal of medicine. 377 (24): e33. <a href="https://doi.org/10.1056/NEJMicm1614216">doi:10.1056/NEJMicm1614216</a> - <a href="https://www.ncbi.nlm.nih.gov/pubmed/29236645">Pubmed</a> <span class="ref_v4"></span>
- 2. Lane F. Donnelly. Fundamentals of Pediatric Imaging. (2016) <a href="https://books.google.co.uk/books?vid=ISBN9780323416191">ISBN: 9780323416191</a><span class="ref_v4"></span>
Sections changed:
- Signs
Systems changed:
- Gastrointestinal
- Paediatrics
Images Changes:
Image 2 X-ray (Frontal) ( create )
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