Ver el código de «WES sign»

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

==See Also==
*[[Biliary ultrasound]]
[[Category:Ultrasound]]

==References==
<references/>

[[Category:Radiology]]
[[Category:GI]]