Type II choledochal cyst is characterized by which feature?

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Prepare for the Ultrasound Registry (URR) Exam with focused practice on abdomen topics. Use flashcards and multiple choice questions with hints and explanations. Achieve exam success with comprehensive study materials.

Multiple Choice

Type II choledochal cyst is characterized by which feature?

Explanation:
Type II choledochal cyst is defined by a true diverticulum arising from the wall of the common bile duct. This is a discrete, sac-like outpouching that communicates with the CBD, usually through a narrow neck, making it extraluminal and solitary. This contrasts with fusiform dilation of the CBD (which enlarges the duct itself), intraduodenal cystic dilation of the CBD (choledochocele), or dilation of the hepatic ducts. A diverticulum is the hallmark feature, and imaging often shows a small pouch connected to the CBD.

Type II choledochal cyst is defined by a true diverticulum arising from the wall of the common bile duct. This is a discrete, sac-like outpouching that communicates with the CBD, usually through a narrow neck, making it extraluminal and solitary. This contrasts with fusiform dilation of the CBD (which enlarges the duct itself), intraduodenal cystic dilation of the CBD (choledochocele), or dilation of the hepatic ducts. A diverticulum is the hallmark feature, and imaging often shows a small pouch connected to the CBD.

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