The WES triad — A specific sonographic sign of gallstones in the contracted gallbladder

Abstract
The “WES” triad — that is, the demonstration of the gallbladderWall, theEcho of the stone, and the acousticShadow — permits the specific diagnosis of stones in a contracted gallbladder. This triad positively identifies the gallbladder and helps to differentiate the contracted gallbladder with stones from a loop of bowel containing gas.