Hepatic hydatid cyst is a disease seen worldwide. The cyst may cause non-specific pressure symptoms like dyspepsia and abdominal pain when it grows into significant sizes. Rupture and secondary infections are the frequently seen complications. Nonetheless, the fistulization of the hydatid cyst into the gastrointestinal system is a very rare complication. A 56-year-old male patient had had cystectomy because of hydatid cyst 6 years ago. He presented to our clinic with dyspeptic complaints. The patient\'s abdominal ultrasonography showed recurrent mass and CT and MRCP imaging and upper gastrointestinal system endoscopy procedures were performed for the patient as advanced diagnostic techniques. The patient was seen to have recurrent hydatid cyst and cystoduodenal fistula. The case was followed-up for two years and did not have any other recurrences. It should be noted that very rare complications like cystoduodenal fistula may be seen in primary and recurrent hydatid cyst cases.