Chylous fistulas belong to complications of cervical block dissections or operations of injuries in supraclavicular region. Its occurrence is between 1 and 4% and is situated mostly on the left. The leakage of lymph is a great load for the patient leading even to disorders of metabolic balance. We have been dealing with six cases of chylous fistulas, two of them on the right side, at our workplace in the years 1990 – 2005. In one patient a conservative treatment was applied, in four patients surgical revisions were made and in one female patient it proved impossible to use any intervention for an extremely rapid course of the disease. Dietary measures are always necessary in the first detection of chylous fistula as well as after a surgical treatment. The operation revision or the time period it is applied is dependent on the extent of the outflow and the time period of duration of conservative treatment.

        Key words: chylous fistula, thoracic duct, the right lymphatic duct, blocking cervical dissection.