Star-shaped pattern of gas-fissuring within gallstones.
Sign occurs due to the gas fissuring within the gallstone.
- Fissures – usually fluid-filled,
- Present in 50% of gallstones.
- Less than half of these fissured gallstones contain some amount of nitrogen gas
Radiolucency caused by the gas usually appears in a triradiate pattern, reminiscent of the Mercedes-Benz logo
Crow’s foot and star‐shaped
Crow’s foot and star‐shaped were previously used to describe fissured gallstones. However, they were replaced by the Mercedes-Benz sign