Type II congenital biliary dilation (biliary diverticulum) with pancreaticobiliary maljunction successfully treated by laparoscopic surgery: report of a case.

Biliary diverticulum or type II congenital biliary dilation accounts for only 1-2% of all patients with congenital biliary dilation. The association between pancreaticobiliary maljunction (PBM) and this type of anomaly remains unclear. A 40-year-old Japanese woman presented with a history of repeated upper abdominal pain for more than 30 years.