[Clinical study on the treatment of infected renal cyst]

A case of infected simple renal cyst and three cases of infected polycystic kidney have been treated during the 6 years from July, 1976 to June, 1982. One of the 3 cases of polycystic kidney, was operated. The other 2 cases were treated with antibiotics. The largest cyst in the present studies appeared to be more than 5 cm in diameter on the X-ray films. To define the limits to chemotherapy of the infected cyst, the relationship between the effect of chemotherapy and the size of the cyst was evaluated from clinical prognosis. From these results, it is strongly suggested that surgical treatment rather than chemotherapy is the best treatment for cysts which are more than 6 cm in diameter or in cases of marked protrusion of the kidney and significant deformation of renal calyces.