The authors of this study report an extraordinary case which is rather rare even in the medical literature. The patient who suffered from recurrence pancreatitis was taken to hospital in septic condition. In the background of the septic condition lied the acut exacerbate of pancreatitis. Besides, in the right side of the thoracic cavity as well as in the peritoneal cavity fistulas of pancreal tail's pseudocyst was found. It was proved by clinical, laboratory and imaging procedure examinations. During the operation external drainage of the pseudocyst was carried out. After several thoracocentesis chylothorax was developed which was cured by permanent chest tube drainage.