[Rare complications in polycystic kidney--the difficulties in their diagnosis and treatment].

The development of some rare complications of renal polycystosis is discussed. Four patients with chronic polycystosis with complications are followed up. In 3 of them (2 of them on chroniodialysis) the cysts suppurated and after an infective conservative treatment they were treated surgically-puncture, cyst excision and unilateral nephrectomy. To the fourth patient bilateral nephrectomy had been performed 5 years ago because of other reasons. All 4 patients are alive at present with a fairly good end result.