Cisto de colédoco em adulto: anomalia da junção do colédoco com o ducto pancreático submetido à ressecção do cisto e à derivação biliar e pancreática / Common bile duct cyst in adult: anomaly of the common bile duct-pancreatic junction submitted to excision of the cyst and a biliary and pancreatic deviation

Common bile duct cysts are rare congenital anomalies which have been diagnosed only in twenty per cent of adults. The etiology is uncertain, but many patients have an anomalous pancreatobiliary junction anatomy. We present a case of a young man with a type I Alonso-Lej/ Todani common bile duct cyst and an anomalous common bile duct-pancreatic junction anatomy. Because the common bile duct did not have a segment of normal caliber, to avoid compromising with the pancreatic channel after the excision of the cyst, we performed a Roux-en-Y anastomosis by anastomosing the biliary duct to the proximal excluded jejunal loop and the common duct-pancreatic junction to the same more distally loop.