[Simultaneous Resection of Mediastinal and Liver Hydatid Disease].

Cystic echinococcosis is an uncommon zoonosis in Japan. Typical location of the cyst is the liver and the lung. Mediastinal hydatidosis is found in less than 0.1% of all hydatid disease patients. We report a rare case of 68 years old male with mediastinal and liver hydatid cysts. Serological test confirmed the diagnosis of hydatidosis. The patient underwent complete resection of mediastinal and liver cysts successfully. Postoperative follow-up for two years has not shown any signs of recurrence. Simultaneous resection of the cysts in different sites including mediastinum is rare and has not been reported in Japan. Hydatid disease is an important differential diagnosis for patient who has cryptogenic liver cyst and history of contact to wildlife or unsterile water.