We report a 29 years old man with a choledochocele or type III choledo
chal cyst, an extremely rare condition. This was found during a cholec
ystectomy using a transcystic intra operative cholangiogram. A transdu
odenal sphincteroplasty was performed. The cyst diameter was 1.5 cm ap
proximately and two 1-2 mm stones were extracted from its lumen. The c
hemical composition of these was different from those located in the g
allbladder. The postoperative period was uneventful and the patient re
mains asymptomatic.