Bow and arrow sign
Bow and Arrow Sign
The Bow and Arrow Sign (pronunciation: /boʊ ænd ˈæroʊ saɪn/) is a radiological sign used in the field of medicine. It is often observed in magnetic resonance cholangiopancreatography (MRCP) scans.
Etymology
The term "Bow and Arrow Sign" is derived from the visual appearance of the sign on MRCP scans, which resembles a bow and arrow. The "bow" refers to the dilated common bile duct (CBD), while the "arrow" refers to the pancreatic duct.
Usage
The Bow and Arrow Sign is used to diagnose choledocholithiasis, a medical condition where gallstones are present in the common bile duct. The sign indicates the presence of a stone in the CBD, causing the duct to dilate and resemble a bow, with the pancreatic duct appearing as the arrow.
Related Terms
- Magnetic Resonance Cholangiopancreatography: A type of imaging test that uses a magnetic field and radio waves to create detailed images of the bile and pancreatic ducts.
- Common Bile Duct: A small, tube-like structure that carries bile from the liver and gallbladder to the small intestine.
- Pancreatic Duct: A duct connecting the pancreas to the common bile duct to supply it with enzymes and bicarbonate.
- Choledocholithiasis: A condition where gallstones are present in the common bile duct.
External links
- Medical encyclopedia article on Bow and arrow sign
- Wikipedia's article - Bow and arrow sign
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