Introduction
Common bile duct (CBD) duplication is an extremely rare congenital anomaly, with most cases reported in adults.Only 14 cases have been reported in children.
Case presentation
A previously healthy 14-month-old girl (8.3 kg) presented with intermittent fevers and diarrhea. There was no history of abdominal pain, jaundice, weight loss, or anorexia. Physical examination was unremarkable. Liver function tests (LFTs) were elevatedelevated (aspartate aminotransferase (AST) 562 U/L, alanine transaminase (ALT) 540 U/L, gamma-glutamyl transferase (GGT) 678 U/L) except for a normal bilirubin. An abdominal ultrasound revealed both dilated intrahepatic and extrahepatic bile ducts. A magnetic resonance cholangiopancreatography (MRCP) demonstrated an intrapancreatic CBD duplication and multiple choledocholithiasis. An endoscopic retrograde cholangiopancreatography (ERCP) was attempted but failed as the endoscope could not pass the child's pylorus. A percutaneous transhepatic cholangiogram confirmed the patient's anatomy and successfully removed the choledocholithiasis. An external-internal biliary drain was placed due to extensive biliary manipulations, and intravenous antibiotics were administered. One week later, definitive surgical management was performed; the patient underwent a laparoscopic CBD resection with a Roux-en-Y hepaticojejunostomy. The postoperative course was unremarkable, and she was discharged on postoperative day 4. One year after surgery, she is doing well with normal LFTs and no recurrence of choledocholithiasis.
Conclusion
Even though they are rare, duplications of the common bile duct should be included in the differential diagnosis of children who develop abdominal pain and have dilatation of the intrahepatic and/or extrahepatic biliary tree.
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