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==Background==
==Background==
The "wall echo shadow" (WES) sign is observed in patients with a contracted gallbladder around a large gallstone.  There are two parallel hyperechoenic lines (Wall) separated by a hypoechoic space (Echo), and distal shadowing (Shadow) from the gallstone.   Patients with multiple gallstones can also produce the finding if the gallbladder is contracted around them.  The sign can distinguish a gallstone from a loop of bowel when the entirety of the gallbladder is not visible due to the large shadowing. <ref>Rybicki FJ. The WES sign. Radiology. 2000;214 (3): 881-2[http://pubs.rsna.org/doi/pdf/10.1148/radiology.214.3.r00mr38881 PDF]</ref><ref>Macdonald FR, Cooperberg PL, Cohen MM. The WES triad - a specific sonographic sign of gallstones in the contracted gallbladder. Gastrointest Radiol. 1981;6 (1): 39-41</ref>
 
*"Wall Echo Shadow" (WES) sign
*Consists of two parallel hyperechoenic lines (Wall) separated by a hypoechoic space (Echo), and distal shadowing (Shadow) from the gallstone.
**Typically observed in patients with a contracted gallbladder around a single large gallstone
**Patients with multiple gallstones can also produce the finding if the gallbladder is contracted around them
**Can also be seen in a "porcelain gallbladder"
*The WES sign can distinguish a gallstone from a loop of bowel when the entirety of the gallbladder is not visible due to the large shadowing.<ref>Rybicki FJ. The WES sign. Radiology. 2000;214 (3): 881-2[http://pubs.rsna.org/doi/pdf/10.1148/radiology.214.3.r00mr38881 PDF]</ref><ref>Macdonald F. et al. The WES triad - a specific sonographic sign of gallstones in the contracted gallbladder. Gastrointest Radiol. 1981;6 (1): 39-41</ref>
 


==Images==
==Images==
[[File:Wes sign.JPG|300px|"Wall Echo Shadow" (WES Sign) Non-obstructing gallstones within a contracted gallbladder]]
[[File:Wes sign.JPG|300px|"Wall Echo Shadow" (WES Sign) Non-obstructing gallstones within a contracted gallbladder]]


==Instructions==
Perform a [[Ultrasound:_Gallbladder|Gallbladder Ultrasound]]


==Sources==
==See Also==
 
*[[Special:MyLanguage/Biliary ultrasound|Biliary ultrasound]]
[[Category:Ultrasound]]
 
 
==References==
 
<references/>
<references/>
[[Category:Rads]][[Category:GI]]
 
[[Category:Radiology]]
[[Category:GI]]
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Revisión actual - 00:03 5 ene 2026


Background

  • "Wall Echo Shadow" (WES) sign
  • Consists of two parallel hyperechoenic lines (Wall) separated by a hypoechoic space (Echo), and distal shadowing (Shadow) from the gallstone.
    • Typically observed in patients with a contracted gallbladder around a single large gallstone
    • Patients with multiple gallstones can also produce the finding if the gallbladder is contracted around them
    • Can also be seen in a "porcelain gallbladder"
  • The WES sign can distinguish a gallstone from a loop of bowel when the entirety of the gallbladder is not visible due to the large shadowing.[1][2]


Images

"Wall Echo Shadow" (WES Sign) Non-obstructing gallstones within a contracted gallbladder


See Also


References

  1. ↑ Rybicki FJ. The WES sign. Radiology. 2000;214 (3): 881-2PDF
  2. ↑ Macdonald F. et al. The WES triad - a specific sonographic sign of gallstones in the contracted gallbladder. Gastrointest Radiol. 1981;6 (1): 39-41
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