Twenty two CBC were diagnosed by ultrasound. The rates of extrahepatic bile duct cyst and both intra and extrahepatic bile duct cyst were 54.5% (12/22) and 45.5% (10/22) respectively.

• 超声检查诊断为先天性胆管囊肿 2 2例 ；其中肝外型胆管囊肿 5 4.；5%25 ( 12 / 2 2 )、混合型胆管囊肿 45