Interorgan fistula is one of the rarest diseases, which is an anatomical disorder in the passage of liquids, gases or air between two organs. Fistulas are extremely rare in the human body, in only 4% of cases of all developmental defects. Most occur before the age of 20, but they can occur at any age. Interorgan fistula has a narrow diagnostic prognostic significance, since it does not require surgical intervention, which is a positive point in the initial stages of the disease. The patient's life expectancy can be very long. It depends on whether there are other symptoms that indicate the disease. If there are none, the prognosis is favorable.