What are the different types of choledochal cysts?

What are the different types of choledochal cysts?

Choledochal cysts are typically diagnosed as one of several types:

• Type I: Cyst of the bile duct.
• Type II: Pouching or sac on the bile duct.
• Type III: Cyst within the wall of the duodenum (where the duct connects to the liver) or pancreas.
• Type IV: A Type I cyst that extends into the liver along the bile ducts.

Which of the following is the most accurate imaging study for diagnosis and classification of choledochal cyst?

CT scanning is highly accurate and offers a great deal of information that is helpful not only in confirming the diagnosis, but also in planning surgical approaches. Computed tomography scan demonstrates a choledochal cyst involving the intrahepatic portion of the common hepatic duct and the main left hepatic duct.

What is a Type 1 choledochal cyst?

Type 1 — a cyst of the extrahepatic bile duct, accounting for up to 90% of all choledochal cysts. Type 2 — an abnormal pouch or sac opening from the duct. Type 3 — a cyst inside the wall of the duodenum. Type 4 — cysts on both the intrahepatic and extrahepatic bile ducts.

What is type II choledochal cyst?

Biliary System. Choledochal cysts are classified into 5 types, based on site of the cyst or dilatation. Type I: Most common variety (80-90%) involving saccular or fusiform dilatation of a portion or entire common bile duct (CBD) with normal intrahepatic duct. Type II: Isolated diverticulum protruding from the CBD.

How is MRCP different from MRI?

A type of MRI called contrast MRI uses a special dye (gadolinium) to enhance the image quality of the organs to be assessed. A magnetic resonance cholangiopancreatography (MRCP) is a subtype of an MRI scan. It takes detailed pictures of the organs, especially the pancreas, gallbladder, and bile ducts.

What does an MRCP MRI show?

Magnetic resonance cholangiopancreatography (MRCP) is a special kind of MRI test. Your healthcare provider uses it to look at the biliary and pancreatic system. This includes the pancreas, the pancreatic duct, the bile ducts, gallbladder, and liver.

What is more detailed MRI or CT scan?

Both MRIs and CT scans can view internal body structures. However, a CT scan is faster and can provide pictures of tissues, organs, and skeletal structure. An MRI is highly adept at capturing images that help doctors determine if there are abnormal tissues within the body. MRIs are more detailed in their images.

What is MRCP vs ERCP?

ERCP and MRCP are used to diagnose problems with the bile and pancreatic ducts. ERCP is more invasive, but it can be used as a treatment for certain conditions. MRCP is noninvasive and is ideal if you’re unable to get ERCP. Your doctor can determine which test is best for you.

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