Choledochal Cyst with Aberrant Right Posterior Sectoral Duct.

Choledochal cysts are focal or diffuse dilatations of the biliary tree. Its association with the aberrant hepatic duct is rarely reported. We present the case of a 14-year-old girl having aberrant right posterior sectoral duct with choledochal cyst. It can be missed on cholangiography and during surgery, leading to serious complications. In this case, it was diagnosed on magnetic resonance cholangiopancreatography and was managed along with cyst excision.