The sonographic criteria for choledochal cyst include all of the following except:

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Choledochal cysts are characterized by their location near the gallbladder, the presence of a bile duct entering the cyst, and the absence of peristalsis within the cyst. The size of a choledochal cyst and the gallbladder typically does not decrease on serial examinations; instead, these cysts may remain the same size or even increase, which distinguishes them from other types of cysts that might reduce in size due to resolution of inflammation or other processes.

The Sonographic Criteria for Choledochal Cyst Include All of the Following