Although they may not drain any liver parenchyma, they can be a source of a bile leak or biliary peritonitis after cholecystectomy in both adults and children. If an<unk>  goes unrecognized at the time of the gallbladder removal, 5–7 days post-operative the patient will develop bile peritonitis, an easily treatable complication with a morbidity rate of 44% if left untreated. Often diagnosed by HIDA scan, a bile leak from an<unk>  post-op can be treated with a temporary biliary stent to redirect the bile from the liver into the intestine and allow the accessory duct to spontaneously seal itself or using a drainage guided by radiology.
Accessory bile duct
Annular pancreas
Accessory pancreas
Bile duct hamartoma
Pancreas divisum
Porcelain gallbladder
Choledochal cysts
Biliary microlithiasis