From April 1995 to May 1996, 32 cases of liver or renal cyts were detected by B ultra sound. Among them, TH glue was injected into the cyst to make it coagulated and occluded in 4 cases of liver cyst and 8 cases of renal cyst after intracapsular fluid was abstracted. The curative effect was good. The curative rate of single injection was 83.3%. The period of treatment and the curative rate were obviously different from the past methods. The present method is easy, quick, small wounded, few complicated and no toxic and side effects.