What is Todani classification?

The Todani classification of bile duct cysts divides choledochal cysts into five groups.

What are the different types of choledochal cysts?

Types and locations of choledochal cysts

  • 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 Choledochocele?

A choledochocele is a cystic dilation of the distal common bile duct (CBD). It corresponds to a type 3 choledochal cyst in the classification by Todani et al1 and is extremely rare. 2. The diagnosis is challenging and rarely made before surgery, as the presenting symptoms vary wildly and are nonspecific.

What causes choledochal cyst?

The cause of choledochal cysts is unknown, but they are congenital, that is, present from birth, and, therefore, represent developmental abnormalities of the bile ducts in the fetus.

What is Roux en Y Hepaticojejunostomy?

What is hepaticojejunostomy? A hepaticojejunostomy, or Roux-en-Y procedure, bypasses the bile duct to allow digestive juices to drain from the liver directly into the small intestine. The hepatic duct is the tubular channel that carries bile from the liver to the small intestine to aid digestion.

What is the most common type of choledochal cyst?


  • Type I cysts. Type I cysts (see image below) are the most common and represent 80-90% of choledochal cysts.
  • Type II cysts.
  • Type III cysts.
  • Type IVA cysts.
  • Type V cysts.
  • Choledochal cyst of the proximal cystic duct.
  • Extrahepatic bile duct duplication.

What is ampulla of Vater?

The ampulla of Vater is a small opening that enters into the first portion of the small intestine, known as the duodenum. The ampulla of Vater is the spot where the pancreatic and bile ducts release their secretions into the intestines.

Can cyst be removed without surgery?

While it may be tempting, you should not try to remove a cyst on your own. Most cysts on the skin are harmless and resolve without treatment. While there are a few home remedies, some cysts do require medical treatment. It’s best to see a doctor for diagnosis and treatment recommendations.

What is Roux-en-Y reconstruction?

In general surgery, a Roux-en-Y anastomosis, or Roux-en-Y, is an end-to-side surgical anastomosis of bowel used to reconstruct the gastrointestinal tract. Typically, it is between stomach and small bowel that is distal (or further down the gastrointestinal tract) from the cut end.

What is the purpose of Roux-en-Y?

Roux-en-Y gastric bypass (RYGB) is a type of weight-loss surgery. Weight-loss surgery is also called bariatric surgery. It’s often done as a laparoscopic surgery, with small incisions in the abdomen. This surgery reduces the size of your upper stomach to a small pouch about the size of an egg.